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GB 50201-2014: Flood control standards
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Basic data | Standard ID | GB 50201-2014 (GB50201-2014) | | Description (Translated English) | Flood control standards | | Sector / Industry | National Standard | | Classification of Chinese Standard | P58 | | Classification of International Standard | 93.160 | | Word Count Estimation | 97,922 | | Date of Issue | 6/23/2014 | | Date of Implementation | 5/1/2015 | | Older Standard (superseded by this standard) | GB 50201-1994 | | Quoted Standard | GB 50288; GB 50863 | | Regulation (derived from) | People's Republic of China Housing and Urban-Rural Development Ministry Bulletin No. 545 | | Issuing agency(ies) | Ministry of Housing and Urban-Rural Development of the People's Republic of China; General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China | | Summary | This Standard applies to flood protection zones, industrial and mining, transportation facilities, power facilities, environmental protection facilities, communications facilities, heritage and tourism facilities, water conservancy and hydropower engineer | GB 50201-2014: Flood control standards---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
1 General
1.0.1 This standard is formulated in order to meet the flood control requirements of various sectors and regions of the national economy and the needs of flood control construction, and to protect people's life and property.
1.0.2 This standard applies to protection objects such as flood protection areas, industrial and mining enterprises, transportation facilities, power facilities, environmental protection facilities, communication facilities, cultural relics and tourist facilities, water conservancy and hydropower projects, and defense against storm floods, snowmelt floods, rain and snow Planning, design, construction and operational management of mixed flood and coastal and estuary defense against tidal waters.
1.0.3 The flood control standards of various protected objects shall not only conform to this standard, but also comply with the current relevant national standards.
2 terms
2.0.1 Flood protection object
The abbreviation of flood protection protection object refers to the object that needs flood protection protection under the threat of flood (tidal) water.
2.0.2 Flood protection area
Areas that may be inundated by flood (tidal) water and that need to be protected by flood control engineering facilities.
2.0.3 Protection grade grade of flood protection
For the same type of protected objects, in order to facilitate the determination of corresponding flood control standards for their scale or nature, they are divided into several grades according to some characteristic indicators from the perspective of flood control.
2.0.4 Equivalent economic scale equivalent economic scale
The product of the per capita GDP index and the population of the flood protection area.
2.0.5 Probable maximum flood
Above the design section of the river, the flood that may occur in terms of hydrometeorology and lasts for a certain period of time is close to the physical upper limit.
3 Basic Regulations
3.0.1 The flood control standard of the protected object should be expressed by the return period of the protected flood or tide; for particularly important protected objects, it can be expressed by the maximum possible flood. According to the needs of different protected objects, the flood control standard can adopt the first level of design or the two levels of design and verification.
3.0.2 The flood control standards of various protected objects should be based on the requirements of economic, social, political, environmental and other factors for flood control safety, coordinate the relationship between local and overall, short-term and long-term, upstream and downstream, left and right banks, and main and tributary streams. The analysis argument is OK. When conditions permit, it is advisable to conduct a comparative analysis of the flood economic losses that may be mitigated by different flood control standards and the required flood control costs.
3.0.3 When the same flood protection area is threatened by different rivers, lakes or ocean floods, the corresponding flood control standards should be determined according to the severity of different rivers, lakes or ocean flood disasters.
3.0.4 For the protection object in the flood protection area, when the required flood protection standard is higher than that of the flood protection protection area and can be protected independently, the flood protection standard of the protection object shall be determined separately, and individual protection measures shall be taken.
3.0.5 When there are more than two kinds of protected objects in the flood protection area, and they cannot be protected separately, the flood control standard of the flood protection area shall be determined according to the higher requirement among the flood protection area and the main protection objects.
3.0.6 For the protected objects that affect the public flood control safety, the higher of the flood control standards required by itself and the public flood control safety shall be determined.
3.0.7 For buildings and structures such as subgrades and enclosures that have flood control functions determined in flood control engineering planning, the flood control standard shall be determined according to the higher of the flood control protection area and the flood control standard of the building or structure.
3.0.8 The flood control standards of the following protected objects can be raised or lowered after demonstration.
1 For protection objects with huge losses and severe impacts after floods or accidents, the flood control standards can be improved;
2 Flood control standards can be lowered for those protected objects with relatively small losses and impacts after floods or accidents, short service life and temporary protection.
3.0.9 If it is really difficult to carry out flood control construction according to the flood control standards specified in this standard, it can be implemented in stages and gradually achieved after reporting to the competent department for approval.
4 Flood Protection Areas
4.1 General provisions
4.1.1 When determining flood control standards, the flood characteristics, topographical conditions, and the separation of rivers, embankments, roads or other features should be analyzed in flood-threatening areas. If they can be divided into several parts for separate protection, they should be divided into independent parts. The flood protection standards of each flood protection area shall be determined separately.
4.1.2 The statistical scope of the population, cultivated land and economic indicators used to divide the protection level of the flood protection protection zone shall adopt the submerged scope of the corresponding standard flood.
4.2 Urban protection zone
4.2.1 Urban protected areas shall be divided into four protection levels according to the importance of political and economic status, resident population or equivalent economic scale indicators, and their protection levels and flood control standards shall be determined according to Table 4.2.1.
Table 4.2.1 Protection grades and flood protection standards of urban protected areas
Note. The equivalent economic scale is the product of the per capita GDP index of the urban protected area and the population, and the per capita GDP index is the ratio of the per capita GDP of the urban protected area to the national per capita GDP in the same period.
4.2.2 For urban protection areas located in plains and lake depressions, when it is necessary to defend against long-lasting river floods or high water levels in lakes, the flood control standard may take the higher value specified in Table 4.2.1 of this standard.
4.2.3 For urban protection zones located in coastal areas with protection level Ⅲ and above, when the design high tide level determined according to the flood control standards in Table 4.2.1 of this standard is lower than the local historical highest tide level, the local historical highest tide level shall also be adopted. Check it out.
4.3 Rural protected areas
4.3.1 Rural protection areas shall be divided into four protection levels according to population or cultivated land area, and their protection levels and flood control standards shall be determined according to Table 4.3.1.
Table 4.3.1 Protection Level and Flood Control Standards of Rural Protected Areas
4.3.2 The flood control standard can be raised for rural protected areas with dense population, well-developed township enterprises or high-yielding crops. For rural protected areas with vast land and sparsely populated areas or with relatively small inundation losses, the flood control standards may be lowered.
4.3.3 Flood diversion operation standards of flood storage and detention areas and construction standards of safety facilities in the area shall be analyzed and determined according to the requirements of the approved river basin flood control plan.
5 Industrial and mining enterprises
5.0.1 Metallurgy, coal, petroleum, chemical, electronics, building materials, machinery, light industry, textile, pharmaceutical and other industrial and mining enterprises shall be divided into four protection levels according to their scale, and their protection levels and flood control standards shall be determined according to Table 5.0.1.For industrial and mining enterprises with special requirements, flood control standards should also be determined through analysis and demonstration in accordance with relevant industry regulations and their own characteristics.
Table 5.0.1 Protection level and flood control standards of industrial and mining enterprises
Note. The scale of various industrial and mining enterprises is divided according to the current national regulations.
5.0.2 For medium-sized and above-sized industrial and mining enterprises in the coastal area, when the design high tide level determined according to the flood control standards in Table 5.0.1 of this standard is lower than the local historical highest tide level, the local historical highest tide level should also be used for verification.
5.0.3 Industrial and mining enterprises should also determine the flood control standard according to the following provisions according to the loss and impact after the flood.
1 When an industrial and mining enterprise suffers huge losses and severe impacts after being submerged by floods, and it takes a long time to resume production, its flood control standard can take the upper limit specified in Table 5.0.1 of this standard or raise it by one level;
2 When an industrial and mining enterprise suffers from a flood, its losses and impacts are small and production can resume soon, its flood control standard can be determined according to the lower limit specified in Table 5.0.1 of this standard;
3 Important parts such as pitheads and wellheads in the underground mining industry shall be checked according to the flood control standard specified in Table 5.0.1 of this standard by one level, or special protective measures shall be taken.
5.0.4 When industrial and mining enterprises are submerged by floods, which may explode or cause a large amount of poisonous liquid, poisonous gas, radioactive and other harmful substances to leak and spread, their flood control standards shall meet the following requirements.
1 For small and medium-sized industrial and mining enterprises, the flood control standard in Table 5.0.1 of this standard shall be adopted;
2 For extra-large and large industrial and mining enterprises, in addition to adopting the upper limit flood control standard in Table 5.0.1 of this standard, special protective measures shall be taken;
3 For the nuclear industry and nuclear safety-related factory areas, workshops and special facilities, the flood control standard higher than once in.200 years should be adopted.
6 Transportation facilities
6.1 Railway
6.1.1 All kinds of buildings and structures of the national standard gauge railway shall be divided into two protection levels according to the importance of the railway in the road network and the forecasted annual passenger and freight volume in the near future. 6.1.1 Determination.
Table 6.1.1 Protection grades and flood control standards for various buildings and structures of national standard gauge railways
Note. 1 The short term refers to the 10th year after delivery and operation;
The 2-year passenger and freight volume is the traffic volume of heavy vehicles, and a pair of passenger trains per day is converted according to the annual freight volume of 1.0Mt.
6.1.2 The flood control standards of the railways passing through the running, storage and flood detention areas shall be determined according to the requirements of the running, storage and flood detention areas in the river section and region, and shall not affect the normal operation of the running, storage and flood detention areas.
6.1.3 The flood control standards for standard-gauge railways dedicated to industrial and mining enterprises shall be determined in accordance with Table 6.1.1 of this standard and combined with the flood control requirements of industrial and mining enterprises1.
6.2 Highway
6.2.1 All kinds of buildings and structures on the road should be divided into four protection levels according to the function of the road and the corresponding traffic volume, and the protection level and flood control standard should be determined according to Table 6.2.1.
Table 6.2.1 Protection grades and flood control standards of various buildings and structures on highways
Note. The annual average daily traffic volume refers to the traffic volume after converting various cars into passenger cars.
6.2.2 The flood control standard of the highway passing through the flood storage and flood detention areas shall be determined in conjunction with the requirements of the river sections and areas, and shall not affect the normal operation of the road, storage and flood detention areas.
6.3 Shipping
6.3.1 The land area of the main port area of the river port shall be divided into three protection levels according to the importance and degree of flooding loss, and the protection level and flood control standard shall be determined according to Table 6.3.1.
Table 6.3.1 Protection level and flood control standard of main port area of river port
Note. The flood control standard of the wharf is determined according to relevant industry standards.
6.3.2 The navigable structures on inland waterways shall be divided into four protection levels according to the tonnage of navigable inland ships, and their protection levels and flood control standards shall be determined in accordance with Table 6.3.2 and the flood control requirements of the water area where they are located.
Table 6.3.2 Protection grades and flood protection standards for structures navigable in inland waterways
Note. 1 Ship tonnage is determined according to the ship's design deadweight tonnage;
2 The protection level of navigable structures for ships with a tonnage of more than 3000t shall be determined according to Class I.
6.3.3 The land area of the main port area of the seaport shall be divided into three protection levels according to the importance of the port and the degree of flooding loss, and the protection level and flood control standard shall be determined according to Table 6.3.3.
Table 6.3.3 Protection Level and Flood Control Standards of Land Areas in Main Port Areas of Seaports
6.3.4 When the design high tide level of the main port area of the seaport determined according to the flood control standards in Table 6.3.3 of this standard is lower than the local historical highest tide level, the local historical highest tide level shall be used for verification. The flood control standard of the main port area of the sheltered third-class seaport can be checked according to the high tide level that occurs once in 50 years.
6.3.5 When the flood control project in the river (sea) port area is a part of the urban flood control project, its flood control standard should not be lower than the flood control standard of the town.
6.4 Civilian airports
6.4.1 Civil airports shall be divided into three protection levels according to the degree of importance and flight area indicators, and their protection levels and flood control standards shall be determined in accordance with Table 6.4.1.
Table 6.4.1 Protection Level and Flood Control Standards of Civil Airports
6.4.2 For civil transport airports with protection class I and annual passenger throughput greater than or equal to 10 million person-times, it shall also be checked in accordance with the 300-year flood control standard; for protection class II and annual passenger throughput Civil transport airports with more than or equal to 2 million passengers should also be checked according to the 100-year flood control standard.
6.4.3 The flood control standard of a civil airport should not be lower than that of the city where it is located.
6.5 Plumbing
6.5.1 Pipeline projects such as oil and gas transmission that pass through and across waters threatened by floods shall be divided into three protection levels according to the scale of the project. Flood protection requirements are determined.
Table 6.5.1 Protection grades and flood control standards for oil and gas pipeline projects
Note. The protection level and flood control standard of the water pipeline project shall be determined according to the relevant provisions of Chapter 11 of this standard.
6.5.2 For especially important large-scale pipeline projects, after analysis and demonstration, the flood control standard greater than once in 100 years can be used for verification.
6.5.3 For pipeline projects such as oil and gas transmission that pass through the bottom of waters where erosion is more severe during flood periods, the buried depth shall meet the scoured depth and planned dredging depth of the corresponding flood control standards at the same time, and a safe buried depth shall be reserved.
6.5.4 The flood control standard of the pipeline project passing through the drainage, storage and flood detention areas shall be determined according to the requirements of the drainage, storage and flood detention areas in the river section and region, and shall not affect the normal operation of the drainage, storage and flood detention areas.
7 Electric facilities
7.1 Thermal power plants
7.1.1 The thermal power plant area shall be divided into three protection levels according to the planned capacity, and the protection levels and flood control standards shall be determined according to Table 7.1.1.
Table 7.1.1 Protection grades and flood protection standards for thermal power plant areas
Note. For seaside Class I thermal power plants in areas seriously affected by storm surges, the flood control standard is set to occur once every.200 years.
7.1.2 The flood control standard of the industrial and mining enterprise's self-provided thermal power plant area shall be compatible with the flood control standard of the industrial and mining enterprise.
7.1.3 The flood control standard of the heat supply thermal power plant area shall be compatible with the flood control standard of the heat supply object.
7.1.4 The surface water shore pump room of the thermal power plant shall be divided into two protection levels according to the size of the thermal power plant, and its protection level and flood control standard shall be determined according to Table 7.1.4.
Table 7.1.4 Protection grades and flood control standards for surface water shore pump houses of thermal power plants
7.2 Nuclear power plants
7.2.1 The flood control standard for nuclear power plants and items related to nuclear safety shall be the design basis flood. The design basis flood shall be determined based on various severe flood events that may affect the safety of the site and their possible adverse combinations, combined with comprehensive analysis of site characteristics.
7.2.2 Severe flood events that may affect the site safety of nuclear power plants shall include astronomical high tide levels, sea level anomalies, storm surge surges, false tide surges, tsunami or lake surge surges, runoff floods, dam break floods, wave, and floods caused by other factors.
7.2.3 For coastal, riverside and estuary nuclear power plants, severe flood events that may affect site safety shall be determined respectively according to the natural conditions of the site, and shall be combined in accordance with relevant regulations, and the maximum value shall be selected as the design basis flood level.
7.2.4 The finally determined design basis flood level of the nuclear power plant shall not be lower than the highest flood level with hydrological records or history.
7.3 High voltage, extra high voltage and extra high voltage power transmission and transformation facilities
7.3.1 The foundations of high-voltage, extra-high voltage and extra-high voltage overhead transmission lines of 35kV and above shall be divided into four protection levels according to the voltage, and their protection levels and flood control standards shall be determined according to Table 7.3.1.The flood control standard of long-span overhead transmission lines can be improved through analysis and demonstration.
Table 7.3.1 Protection grades and flood control standards for high-voltage, extra-high voltage and ultra-high voltage overhead transmission lines
7.3.2 35kV and above high-voltage, ultra-high voltage and ultra-high voltage substation facilities shall be divided into three protection levels according to the voltage, and their protection levels and flood control standards shall be determined in accordance with Table 7.3.2.
Table 7.3.2 Protection grades and flood protection standards for high-voltage and ultra-high-voltage substation facilities
7.3.3 The flood control standards for high-voltage power transmission and transformation facilities dedicated to industrial and mining enterprises shall be compatible with the flood control standards of the industrial and mining enterprises.
8 Environmental Protection Facilities
8.1 Tailings Pond Project
8.1.1 The protection level and flood control standard of the main buildings of the tailings pond project of industrial and mining enterprises shall comply with the relevant provisions of the current national standard "Code for Design of Tailings Facilities" GB 50863.
8.1.2 When the tailings pond accident will cause serious disasters to important downstream residential areas, industrial and mining enterprises or traffic arteries, the protection level can be raised by one level after demonstration.
8.1.3 For tailings ponds that store uranium ore and other radioactive and harmful tailings, which may cause extremely serious damage to the environment after the accident, the flood control standard should be improved, and the possible maximum flood can be adopted as the subsequent flood control standard if necessary.
8.2 Ash storage works
8.2.1 The valley ash storage project of the thermal power plant shall be divided into three protection levels according to the scale of the project, and its protection level and flood control standards shall be determined according to Table 8.2.1.
Table 8.2.1 Protection Level and Flood Control Standards of Thermal Power Plant Valley Ash Storage Project
Note. When the grades determined according to the final dam height and the total volume are different, the higher one shall prevail. When the difference is greater than one level, the higher one will be lowered by one level.
8.2.2 When there are important residential areas, industrial and mining enterprises or traffic arteries downstream of the ash storage yard in the valley, their protection level can be improved by one level after demonstration, and corresponding flood control standards should be selected.
8.2.3 The embankment project of tidal flat ash storage area of thermal power plant shall be divided into two protection levels according to the total volume, and the protection level and flood control standard shall be determined according to Table 8.2.3.When the embankment of the ash storage yard is part of the river (sea) embankment, its design flood control standard should not be lower than that of embankment engineering.
Table 8.2.3 Protection Level and Flood Control Standards of Embankment Works of Tidal Flat Ash Storage Fields in Thermal Power Plants
Note. The inside of the embankment refers to the ash storage side.
8.2.4 The flood control standards for other types of ash storage yards can be determined through analysis and demonstration in accordance with the provisions of thermal power plant ash storage yards or tailings ponds in combination with their own characteristics.
8.3 Waste treatment project
8.3.1 Municipal solid waste sanitary landfill projects shall be divided into three protection levels according to the project construction scale, and the protection levels and flood control standards shall be determined according to Table 8.3.1, and shall not be lower than the local flood control standards.
Table 8.3.1 Protection Level and Flood Control Standards of Municipal Solid Waste Sanitary Landfill Project
8.3.2 For the centralized treatment project of chemical disinfection and microwave disinfection of medical waste, the factory area should meet the 100-year flood control standard.
8.3.3 For the centralized incineration and disposal project of hazardous waste, the factory area should meet the flood control standard of once in 100 years.
9 Communication facilities
9.0.1 Public long-distance communication lines shall be divided into three protection levels according to the importance and facility content, and their protection levels and flood control standards shall be determined in accordance with Table 9.0.1.
Table 9.0.1 Protection grade and flood protection standard of public long-distance communication lines
9.0.2 Public communication bureaus and institutes shall be divided into two protection levels according to the importance and facility content, and their protection levels and flood control standards shall be determined according to Table 9.0.2.
Table 9.0.2 Protection level and flood control standards of public communication bureaus and stations
9.0.3 Public communication stations and stations shall be divided into two protection levels according to the importance and facility content, and their protection levels and flood control standards shall be determined according to Table 9.0.3.
Table 9.0.3 Protection level and flood protection standard of public communication stations and stations
9.0.4 For communication facilities dedicated to transportation, water conservancy and hydropower projects, and power facilities, the flood control standards shall be determined according to the requirements of the service objects.
10 Cultural relics and tourist facilities
10.1 Cultural relics and monuments
10.1.1 Cultural relics and historic sites not resistant to flooding shall be divided into three protection levels according to the protection level of cultural relics, and their protection levels and flood control standards shall be determined according to Table 10.1.1.
Table 10.1.1 Protection grades and flood control standards of cultural relics and historic sites
Note. World-class cultural relics refer to the world cultural heritage listed in the "World Heritage List" and the cultural heritage part of the world cultural and natural dual heritage.
10.1.2 For particularly important cultural relics and historic sites, their flood control standards can be increased after full demonstration and approval by the competent authority.
10.2 Tourist facilities
10.2.1 Tourist facilities threatened by floods shall be classified into three protection levels according to the level of scenic spots, tourism value, popularity and degree of flooding loss, and their protection levels and flood control standards shall be determined in accordance with Table 10.2.1.
Table 10.2.1 Protection grade and flood protection standard of tourist facilities
10.2.2 The flood control standard of cultural relics and historic sites for sightseeing shall be determined according to the higher one of Table 10.1.1 and Table 10.2.1 of this standard according to its protection level.
11 Water conservancy and hydropower projects
11.1 Grades of water conservancy and hydropower projects
11.1.1 The grading of water conservancy and hydropower projects shall be determined according to their comprehensive utilization tasks and functional categories or different project types based on project scale, benefits and importance in the economy and society.
11.1.2 The classification of water conservancy and hydropower projects shall be determined according to the tasks and functional categories undertaken, and shall comply with the following regulations.
1 The grades of flood control and waterlogging control projects shall be determined according to Table 11.1.2-1 according to the importance of the protected objects and the benefited area.
Table 11.1.2-1 Grades of flood control and waterlogging control projects
2 The classification of water supply, irrigation and power generation projects shall be determined according to Table 11.1.2-2 according to the water supply scale, importance of water supply objects, irrigated area and installed capacity.
Table 11.1.2-2 Grades of Water Supply, Irrigation and Power Generation Projects
Note. 1 Water diversion projects across river basins, water systems, and regions are included in water supply projects for unified determination;
2 The water diversion flow of the water supply project refers to the designed water diversion flow at the head of the canal, and the annual water diversion refers to the average annual water diversion at the head of the canal for many years;
3 The irrigated area refers to the designed irrigated area.
3 The grade of the navigation engineering on the reservoir hub project shall be determined according to Table 11.1.2-3 according to the class of the channel and the tonnage of the designed navigable ship.
Table 11.1.2-3 Grades of Navigation Engineering
Notes. 1 The designed tonnage of navigable ships refers to the maximum deadweight tonnage of ships passing through navigable structures, and refers to the maximum deadweight tonnage of barges forming the fleet when passing through by fleets;
2 The level of the channelization hub project on the inter-provincial V-level waterway will be improved by one level.
11.1.3 For projects that mainly provide urban water supply, the grade of the project shall be determined according to the three indicators of the importance of water supply objects, water diversion flow and annual water diversion volume. When determining the grade, at least two indicators shall meet the requirements. For water supply projects mainly based on agricultural irrigation, the grade of the project should be determined according to the irrigated area index.
11.1.4 The grades of reservoirs, sluices, irrigation and drainage pumping stations and water diversion projects shall be determined according to Table 11.1.4 according to the project scale.
Table 11.1.4 Grades of Reservoirs, Dams, Irrigation and Drainage Pumping Stations and Water Diversion Projects
Note. 1.The total storage capacity of the reservoir refers to the static storage capacity below the highest water level of the reservoir. The total storage capacity of the reservoir hub that basically returns to its natural state during the flood period adopts the static storage capacity below the normal water storage level;
2 Barrage sluice project refers to the sluice hub project in the plain area, and the flow through the sluice is the discharge flow of the sluice when the flood is discharged according to the check flood standard;
3 The irrigation water diversion hub project includes the irrigation water intake hubs arranged along the river or along the river, and the water diversion flow adopts the design flow;
4 Pumping station engineering refers to water pumping stations for irrigation and drainage (waterlogging), and its installed capacity and installed power refer to single-station indicators including standby units; The grade can be determined according to the scale index of the system.
11.1.5 When the grades determined by engineering tasks, functional categories or project types are different, the grades shall be determined by the higher one.
11.2 Water Conservancy and Hydropower Engineering Building Classes
11.2.1 The grades of permanent hydraulic structures in water conservancy and hydropower projects shall be determined in accordance with Table 11.2.1 according to the grade, function and importance of the projects to which they belong.
Table 11.2.1 Grades of permanent hydraulic structures
11.2.2 The main permanent hydraulic structures of grade 2 to grade 5 of water conservancy and hydropower projects with huge losses or serious impacts after the accident can be upgraded to one grade after demonstration and approval by the competent department, and the design flood standard should be raised accordingly; The main permanent hydraulic structures of grade 1 to grade 4 of water conservancy and hydropower projects that cause little loss can be lowered by one grade after demonstration and approval by the competent department.
11.2...
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