GB/T 17808-2021 (GB/T17808-2021, GBT 17808-2021, GBT17808-2021) & related versions
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GB/T 17808-2021: PDF in English (GBT 17808-2021)
GB/T 17808-2010
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 91.220
P 97
Replacing GB/T 17808-1999
Road construction and road maintenance machinery
and equipment - Asphalt mixing plant
沥青混合料搅拌设备
ISSUED ON: DECEMBER 01, 2010
IMPLEMENTED ON: MARCH 01, 2011
Issued by: General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative references ... 5
3 Terms and definitions ... 6
4 Classification ... 8
5 Technical requirements ... 8
6 Test method ... 18
7 Inspection rules ... 47
8 Marking, packaging, transport, storage ... 49
9 Completeness of supply ... 51
Appendix A (Informative) Test record form of asphalt mixing plant ... 52
Road construction and road maintenance machinery
and equipment - Asphalt mixing plant
1 Scope
This standard specifies the classification, technical requirements, test methods,
inspection rules, marking, packaging, transportation, storage, quality assurance
requirements and complete supply of road construction and maintenance
machinery and equipment - Asphalt mixing plant (hereinafter referred to as
asphalt mixing plant) .
This standard applies to asphalt mixing plant.
2 Normative references
The provisions in following documents become the provisions of this Standard
through reference in this Standard. For the dated references, the subsequent
amendments (excluding corrections) or revisions do not apply to this Standard;
however, parties who reach an agreement based on this Standard are
encouraged to study if the latest versions of these documents are applicable.
For undated references, the latest edition of the referenced document applies.
GB 150 Steel pressure vessels
GB/T 1955 Construction winch
GB/T 3766 General rules for hydraulic system (GB/T 3766-2001, eqv ISO
4413:1998)
GB 5226.1 Safety of machinery - Electrical equipment of machines - Part 1:
General requirements (GB 5226.1-2002, IEC 60240-1: 2000, IDT)
GB 7258 Safety specifications for power-driven vehicles operating on roads
GB/T 7920.11 Road construction and maintenance equipment - Asphalt
mixing plants - Terminology and commercial specifications (GB/T 7920.11-
2006, ISO 15642:2003, IDT)
GB/T 7932 Pneumatic fluid power - General rules relating to systems (GB/T
7932-2003, ISO 4414:1998, IDT)
Fixed asphalt mixing plant
The asphalt mixing plant which uses fixed installation, all or part of which
needs the support from transportation means during relocation.
3.2
Movable asphalt mixing plant
The asphalt mixing plant, all or most of which are equipped with walking
devices, that use the traction mechanism as the main means of transport
during relocation.
3.3
Standard operating mode
The condition of medium-grain ordinary asphalt mixture at which the ambient
temperature is 20 °C, it is at the standard atmospheric pressure, the average
moisture content of the cold aggregate is 5%, the diesel fuel is used, the hot
aggregate temperature is 160 °C or the finished material temperature is
140 °C.
3.4
Fuel consumption rate
Under standard operating conditions, for every ton of finished material
produced by continuous asphalt mixing plant or for every ton of hot
aggregate produced by intermittent asphalt mixing plant, the amount of
diesel fuel consumed by the drum burner.
Note: The calorific value of diesel is calculated at 46055 kJ/kg.
3.5
Static calibration measurement accuracy (abbreviated as static
accuracy
It is the calibration accuracy of the standard weight, expressed as a
percentage, as the relative error of the difference between the value of the
standard weight and the indicated value to the agreed value of the standard
weight.
3.6
Dynamic batching measurement accuracy (abbreviated as dynamic
accuracy)
5.3.2 The weld shall be flat, well-proportioned, free from defects; meet the
requirements of JB/T 5000.3.
5.3.3 The surface of the castings shall be clean, free of pores, looseness and
other defects; meet the requirements of JB/T 5000.4 and JB/T 5000.6.
5.3.4 Piping and joints shall be clean and unobstructed, sealed reliably; meet
the requirements of JB/T 5000.11.
5.3.5 The hydraulic system shall meet the requirements of GB/T 3766.
5.3.6 The quality of the paint film shall meet the requirements of JG/T 5011.12.
5.3.7 The equipment shall be easy to transport; the hoisting and transportation
shall comply with the requirements of relevant standards.
5.4 Towing performance requirements of movable mixing plant
5.4.1 When each transport unit is towed by a wheeled tractor, the driving speed
shall not be higher than 20 km/h. The components are connected reliably,
without loosening, deformation or damage.
5.4.2 The size limits of each transport unit during towing are as follows: total
height 4.5 m, total width 3 m, total length 20 m.
5.4.3 The minimum turning diameter is not more than 60 m; the minimum
ground clearance is not less than 265 mm.
5.4.4 The axle load of the transport unit shall meet the requirements of relevant
specifications and shall not deviate from the design value by ±2.0%.
5.4.5 When driving at a speed of 20 km/h, the maximum braking distance shall
meet the requirements of GB 7258.
5.5 Assembly technical requirements
5.5.1 Cold material supply system
5.5.1.1 The cold material supply system consists of cold material silos, feeders,
aggregate belt conveyors, inclined belt conveyors.
5.5.1.2 The cold material silo's volume and material supply capacity shall meet
the requirements of the maximum production capacity of the asphalt mixing
plant; the material supply shall be stable and reliable.
5.5.1.3 The cold material silo adopts a multi-silo structure; its quantity shall meet
the grading requirements of the mixture. The fine material silo shall be equipped
with an arch breaking device.
5.5.2.8 There shall be no leakage of material at the material outlet and material
inlet & outlet boxes.
5.5.3 Burner
5.5.3.1 The burner is composed of air supply system, fuel supply system, nozzle,
proportional adjustment device, ignition and electrical control system.
5.5.3.2 The heating capacity shall meet the needs of the maximum production
capacity of the mixing plant.
5.5.3.3 The ignition shall be rapid; the safety devices such as flame monitoring
and flameout protection shall be installed, which is stable and reliable.
5.5.3.4 It shall be able to stably burn; the air-fuel ratio shall be easily adjusted.
5.5.3.5 The flame shape shall be well matched with the drum; the flame rigidity
is good; no obvious deviation is allowed.
5.5.3.6 The high-temperature zone shall be made of heat-resistant steel plates;
if refractory materials need to be installed, they shall be easily replaced.
5.5.3.7 Filters, overflow valves and pressure gauges shall be installed in the oil
supply pipeline.
5.5.3.8 The heavy oil burner shall be equipped with heavy oil storage, heating,
filtering and light-heavy oil switching devices.
5.5.3.9 The pulverized coal burner shall be equipped with pulverized coal
conveying and light oil ignition system. The pulverized coal has good
adaptability, less slagging in the furnace and easy to clean.
5.5.4 Hot aggregate hoist
5.5.4.1 It is composed of shell, chain, sprocket, hopper, power device.
5.5.4.2 The lifting capacity shall meet the requirements of the maximum
production capacity of the mixing equipment.
5.5.4.3 It shall be completely sealed; there shall be no leakage or dust emission
during work.
5.5.4.4 It shall meet the relevant requirements of JB/T 3926.2; be equipped with
tensioning and anti-reverse devices; run smoothly.
5.5.4.5 The service life of chains and sprockets shall not be less than 5000 h.
5.5.4.6 The hopper shall be made of wear-resistant steel plate and be easy to
5.5.7.1 The measurement capability shall meet the maximum production
capacity requirements of the equipment; its accuracy shall meet the
requirements of Table 2.
5.5.7.2 The minimum display inductance value of aggregate measurement is 1
kg.
5.5.7.3 The minimum display sensitivity value for the measurement of powder,
asphalt and additives is 0.1 kg.
5.5.7.4 There shall be a protective device to prevent dust from overflowing;
there shall be no jamming in the vertical direction.
5.5.7.5 The asphalt weighing barrel shall be equipped with heating and heat
preservation devices and devices to prevent asphalt overflow.
5.5.8 Agitator
5.5.8.1 The agitator is a compulsory type, consisting of a shell, a mixing shaft,
a mixing blade, a mixing arm, a liner, a power device.
5.5.8.2 The mixing capacity shall meet the production capacity requirements of
the mixing equipment under standard working conditions.
5.5.8.3 The volume and speed shall meet the requirements of maximum mixing
capacity.
5.5.8.4 The mixing blades, mixing arms, lining plates are made of wear-resistant
materials for easy replacement; the service life of the blades and lining plates
shall be not less than 50000 batches; the service life of the mixing arm shall be
not less than 80000 batches.
5.5.8.5 The discharge door shall be opened and closed flexibly; there is no
leakage of material or ash after being closed.
5.5.8.6 Ventilation ducts, inspection doors and safety protection devices or
warning signs shall be provided.
5.5.8.7 The opening height of the lower part is not less than 3.3 m; the opening
width is not less than 3 m.
5.5.9 Powder supply system
5.5.9.1 The powder supply volume of the powder supply system shall meet the
requirements of various asphalt mixture gradations.
5.5.9.2 The storage capacity of the powder tank shall ensure that the mixing
equipment works continuously for not less than 6 hours under standard
5.5.12 Finished material hoist
5.5.12.1 According to the conveying mode, it can be divided into two modes:
scraper conveyor and transportation trolley.
5.5.12.2 The lifting capacity shall meet the requirements of the maximum
productivity of the mixing equipment.
5.5.12.3 The scraper conveyor is completely sealed; the working surface shall
be covered with wear-resistant steel plates, which are easy to replace; the
bottom is equipped with a heating device.
5.5.12.4 The scraper conveyor shall be equipped with a tensioning device and
an anti-reversal device; run smoothly without jamming.
5.5.12.5 The service life of the chain and sprocket of the scraper conveyor hoist
is not less than 5000 h.
5.5.12.6 The scraper of the scraper conveyor shall be made of wear-resistant
steel plate and be easy to replace.
5.5.12.7 The working surface of the trolley track shall be equipped with wear-
resistant steel plates. The trolley runs smoothly and is positioned accurately.
Derailment or jamming is not allowed.
5.5.12.8 The trolley's discharge door opens flexibly and does not leak when
closed; it can discharge cleanly within the specified time.
5.5.12.9 The traction wire rope, reel, brake, etc. of the trolley shall be safe and
reliable; meanwhile it shall meet the requirements of GB/T 1955.
5.5.13 Finished product silo
5.5.13.1 The storage capacity of the silo shall ensure that the mixing equipment
works continuously for at least 30 minutes under the maximum production
capacity.
5.5.13.2 The silo shall have a device to prevent segregation of the well-mixed
asphalt mixture.
5.5.13.3 Insulation measures shall be provided; at least a heating device shall
be provided at the discharge bin door.
5.5.13.4 The temperature drop of the asphalt mixture in the silo shall not exceed
10 °C within 12 hours.
5.5.13.5 The high material level indicator shall be set.
5.5.16 Pneumatic control system
5.5.16.1 The system pressure and air supply volume shall match the maximum
production capacity of the mixing plant and meet the requirements of GB/T 7932.
5.5.16.2 The air path system shall be equipped with filters, lubricators, pressure
reducing valves, oil-water separators; it shall be easy to maintain.
5.5.16.3 The air path system shall be equipped with a gas storage tank and a
safety valve. The opening pressure of the safety valve shall not be greater than
the safety setting value of the device.
5.5.17 Safety and environmental protection
5.5.17.1 Asphalt mixing plant shall be affixed with safety warning signs at
suitable locations; the signs shall be clear and easy to understand.
5.5.17.2 Working platforms, staircases, railings, etc. shall meet the
requirements of relevant specifications and be safe and reliable.
5.5.17.3 Rotating parts such as exposed couplings and belt drives shall be
equipped with protective devices.
5.5.17.4 Safety devices such as pressure gauges, thermometers, safety valves
shall be complete, sensitive and reliable; the pressure vessels shall meet the
requirements of GB 150.
5.5.17.5 The fuel tank shall be equipped with flame arrester and rainproof
facilities.
5.5.17.6 When a system fails during the production process of the mixing plant,
the corresponding system shall be able to perform chain protection.
5.5.17.7 All parts of the asphalt mixing plant shall be equipped with effective
dust spill protection devices.
5.5.17.8 Asphalt mixing plant manufacturers shall remind users to equip fire
extinguishers and have lightning protection measures; the lightning protection
facilities and grounding grids shall be designed and constructed by qualified
professional organizations, meanwhile meet the relevant requirements of GB
50057.
6 Test method
6.1 Test preparation and requirements
6.1.1 Test site:
equipment shall be debugged and run-in; the run-in time shall not be less
than 50 h. After the run-in is over, perform maintenance according to the
requirements of the product manual. Fill in the equipment run-in status
and test records in Table A.2.
6.2 Axle load measurement of movable mixing plant
6.2.1 Test conditions:
a) All the assemblies, parts, accessories and auxiliary devices (including
vehicle-mounted tools) of the prototype must be fully equipped according
to requirements and installed on the prescribed devices. The adjustment
status shall meet the requirements of the equipment technical conditions;
the lubricant shall be applied as required.
b) The tire pressure shall meet the requirements of the instruction manual;
the error shall not exceed ±10 kPa.
c) All parts of the prototype shall be clean and free of oil stain, mud or other
dirt.
d) Movable accessories or attachments on the outside of the prototype shall
be in normal working conditions (such as towing hooks, etc.).
6.2.2 Test equipment:
Wagon balance (accuracy 0.5%), level, steel tape (range 30 m).
6.2.3 Test method:
a) The front wheel of the tested unit of the prototype is stopped outside the
wagon balance; the rear wheel stays on the wagon balance and keeps the
prototype leveling. The measured value is the load distribution of the rear
axle in this state.
b) The rear wheel of the prototype is stopped outside the wagon scale; the
front wheel is left on the wagon scale and keeps the prototype leveling.
The measured value is the load distribution of the front axle in this state.
6.2.4 Test results:
The test results are recorded in accordance with Table A.3.
6.3 Towing test of movable mixing plant
6.3.1 Minimum turning diameter test
6.3.1.1 Test conditions:
6.4.2.1 Test conditions:
a) The preparation of raw materials shall meet the requirements of 6.1.3;
b) The prototype of the mixing equipment operates stably; the burner may
not work;
c) The dynamic accuracy measurement must be performed after the static
accuracy calibration.
6.4.2.2 Test equipment:
Wagon balance (accuracy 0.5%), secondary scale or secondary dynamometer,
hauling truck, hopper, asphalt barrel, etc.
6.4.2.3 Test method:
a) According to the batching scales with different functions, the batching test
is carried out at 50% and 100% full scale, respectively; record the set
value and actual measured value of each material. The test is repeated
three times and the average is taken. The interval between two tests shall
be greater than 15 minutes.
b) For continuous mixing plant, carry out batching test at 50% and 100% of
full scale, respectively; receive the material at the material outlet; use a
stopwatch for timekeeping. Aggregate's receiving time is not less than 5
minutes each time, whilst asphalt and powder's receiving time are not less
than 10 seconds each time. Record the actual measured value and set
value each time. The test is repeated three times and it takes the average
value as the result. The interval between two tests is not less than 10 min.
6.4.2.4 Test results:
a) The test results are recorded in accordance with Table A.8.
b) The measurement accuracy is calculated according to formulas (2) and
(3), but mi is the actual measured value of the material and mi' is the set
value.
6.5 Measuring accuracy of thermometers
6.5.1 Test conditions:
Test conditions: No rain, wind speed not greater than 3 m/s.
6.5.2 Test equipment:
Thermometer, stopwatch.
a) Cold aggregate moisture testing: When the equipment is under the rated
production state, take a sample at the outlet of the aggregate belt
conveyor. The sample weighs about 8 kg. After mixing, use the quarter
method to take 2 kg as a sample. Place it in an oven at 105 °C ± 5 °C to
bake it for 8 h. Weigh the mass of the sample before and after drying. The
test is carried out 5 times. Take the average value as the result.
b) Hot aggregate residual moisture testing: When the equipment is under
rated production state, take a sample at the outlet of the drying drum. The
sample weighs about 8 kg. After mixing, use the quarter method to take 2
kg as a sample; bake it at 160 °C for 8 hours; weigh the mass of the
sample before and after drying. The test is carried out 5 times. Take the
average value as the result.
6.8.1.4 Test results:
The test results are recorded according to Table A.13 and Table A.14.
6.8.2 Temperature stability test
6.8.2.1 Test conditions:
The mixing equipment works continuously under standard conditions.
6.8.2.2 Test equipment:
Thermometer, timer.
6.8.2.3 Test method:
It is carried out at the same time as the productivity test. During the test,
samples are taken at the discharge port of the drum. The forced gap asphalt
mixing plant uses the dried hot aggregate, whilst the continuous drum asphalt
mixing plant uses the mixed finished material. The testing of material
temperature is completed within 2 minutes after sampling. Take sample for
testing once every about 3 min; perform 20 consecutive times.
6.8.2.4 Test results:
a) The test results are recorded in accordance with Table A.15 and Table
A.16.
b) The test data is calculated according to formula (4) ~ formula (9).
Temperature stability is calculated according to formula (4):
It shall meet the requirements of 6.8.3.1.
6.9.2 Test equipment:
Bench scales, balances, standard sieves, sampling boxes, etc.
6.9.3 Test method:
According to the production mix ratio, take samples from the outlets of each silo.
Use the quarter method to take about 2 kg of sample, to perform the screening
test; separate the material groups of various particle sizes and list them after
weighing. For drum-type mixing equipment, take samples from the outlet of the
cold material silo; for forced mixing equipment, take samples from the outlet of
the hot material silo.
6.9.3.1 Test results:
a) The experimental results are recorded in accordance with Table A.20;
b) Draw a gradation curve.
6.10 Analysis of finished material quality indicators
6.10.1 The test conditions shall meet the requirements of 6.8.3.1.
6.10.2 Test equipment:
Extraction instrument, bench scale, balance, centrifuge, thermometer, sampling
box, etc.
6.10.3 Test method:
a) In the finished product silo or the agitator's discharge port, use a special
container to directly collect the material sample. Collect more than 5 kg of
test material each time. Take the material once every 3 minutes; sample
20 times continuously. Take about 2 kg from each specimen by the quarter
method. Carry out an extraction and screening test on the finished
material according to the requirements of JTJ 052. Analyze the deviation
of the asphalt content and the aggregate gradation composition in the
finished material;
b) If the material is taken from the finished product truck, sampling shall be
at 2/3 of its stacking height; the depth of the sampling point shall not be
less than 20 cm. The sampling weight method is the same as above.
6.10.4 Test results and data processing:
a) The test results are recorded in accordance with Table A.21, Table A.22,
6.12 Determination of environmental protection parameters
6.12.1 Noise test
6.12.1.1 Test conditions:
a) The weather is no rain; the wind speed is not more than 3 m/s;
b) The test shall be carried out in an open field; there shall be no large
reflectors (such as buildings, fences, etc.) within 50 m from the maximum
noise source; the background noise shall be more than 10 dB(A) lower
than the noise of the tested prototype;
c) Except for the person measuring the noise near the sound level meter,
other people shall be behind the person measuring the noise;
d) The mixing equipment operates stably under rated conditions; other
auxiliary equipment equipped is also a source of noise. Whether it is
activated during measurement shall be determined according to normal
use.
6.12.1.2 Test equipment:
Sound level meter, tape measure.
6.12.1.3 Test method:
a) When measuring environmental noise, first equally divide 8 measuring
points on a circle with a radius of 30 m from the largest noise source and
mark them as A, B, C, D, E, F, G, H; then place the test pickup on the
measuring point at 1.2 m above the floor; use a tripod to fix it and make it
parallel to the bottom surface, aiming at the largest noise source;
b) When measuring the noise of the operating station, close the doors and
windows; arrange the measuring point 100 mm from the operator's ear;
aim the pickup at the largest noise source;
c) The test method is carried out in accordance with the relevant
requirements of JG/T 5079.2.
6.12.1.4 Test results and data processing:
a) The test results are recorded in accordance with Table A.25 and Table
A.26;
b) The test data processing is carried out in accordance with the relevant
requirements of JG/T 5079.2.
b) The sampling pipeline shall be as short and straight as possible; the
necessary dust filtering device shall be installed;
c) The sampling pipe shall be inclined along the flue gas's flow direction; the
entire sampling pipe shall be tight and leak-proof;
d) After the mixing equipment is operating stably under rated conditions,
according to the above distribution principle, perform multi-point sampling
on the same cross-section, to calculate the average;
e) Each point uses 0.5 min ~ 2 min; the test is repeated 3 times; take the
average value as the result.
6.12.4.4 Test results:
The test results are recorded in accordance with Table A.29.
6.13 Reliability test
6.13.1 Test purpose
Through the 200 h reliability test of the mixing equipment prototype, to assess
the reliability of the prototype operation under the specified conditions.
6.13.2 Test site
The test site shall meet the requirements of 6.1.1a).
6.13.3 Test conditions
The reliability test conditions are as follows:
a) The reliability test time is not less than 200 h, which does not include the
equipment running-in, no-load operation, performance test time;
b) During the test, the average load rate of the equipment is not less than
85% of the rated productivity; the working time under the rated load is not
less than 30% of the test time;
c) The asphalt mixture produced by the prototype equipment must meet the
requirements of JTG F40;
d) During the prototype operation, the equipment must be in good condition;
the cumulative operation time per operation shift shall not be less than 5
h;
e) During the test, experienced technicians shall operate and maintain in
strict accordance with provisions, to prevent illegal operations and faulty
c) Products remanufactured after being discontinued for more than two years;
d) Products with serious accidents or failing to pass sampling inspections;
e) When the national quality supervision agency conducts a comprehensive
quality inspection.
7.3.2 Type inspection is sampling inspection.
7.3.3 The inspection items for type inspection shall be inspected and judged
according to all the contents as specified in the technical requirements.
7.3.4 The test items for type inspection shall be in accordance with Table 8.
7.3.5 In the type inspection, the conditions a) and b) belong to appraisal
inspection, which is performed on one unit as randomly selected from the trial
prototype; the conditions c) ~ e) belong to quality consistency inspection, which
is performed by using a random sampling method, to take one unit from the
products which were produced in the same year or recently and had passed
the exit-factory inspection.
7.3.6 Judgment rules
7.3.6.1 If the inspected mixing equipment does not meet the requirements of
any one of the main performance indicators of this standard (category A items
in Table 8), it is judged as unqualified.
7.3.6.2 If there are more than three items (including three) of category B items
in Table 8 that are unqualified, the products that are sampled are allowed to be
re-inspected after rectification. If there are still three unqualified items in the re-
inspection, they will be judged as unqualified.
7.3.6.3 The category C items in Table 8 have little impact on the performance
of the equipment; or items that are affected by materials and operating levels
and are not fully controlled by the equipment, are not used as the basis for
determining the qualification of the equipment. They are only used as a
reference for the excellent and good equipment.
8 Marking, packaging, transport, storage
8.1 Marking
The markings shall be set in a position that is easy to observe; the text content
and graphic prompts shall be easy to identify.
8.1.1 The product marking shall include the following:
......
| Standard ID | GB/T 17808-2021 (GB/T17808-2021) | | Description (Translated English) | Road construction and maintenance machinery and equipment -- Asphalt mixing plant | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | P97 | | Classification of International Standard | 91.220 | | Word Count Estimation | 53,593 | | Date of Issue | 2021-10-11 | | Date of Implementation | 2022-05-01 | | Older Standard (superseded by this standard) | GB/T 17808-2010 | | Drafting Organization | CCCC Xi'an Road Construction Machinery Co., Ltd., Sany Automobile Manufacturing Co., Ltd., Fujian Tietuo Machinery Co., Ltd., Chang'an University, Fujian South Road Machinery Co., Ltd., Beijing Jialong Construction Machinery Co., Ltd., Yalong Road Construction in Nanyang City Machinery Manufacturing Co., Ltd., Liaoyang Road Construction Machinery Co., Ltd., Wuxi Xitong Construction Machinery Co., Ltd., Taian Yueshou Mixing Station Equipment Co., Ltd., Wuxi Xuetao Group Co., Ltd., Jiangyin Xinhai Highway Machinery Material Co., Ltd., Jiangsu Aokai Environmental Protection Technology Co., Ltd., Xinxiang Green Machinery Co., Ltd., Changzhi Shangdang District Yutong Machinery Equipment Co., Ltd., Shandong University, Beijing Construction Mechanization Research Institute Co., Ltd., China Construction Education Association | | Administrative Organization | National Construction Machinery and Equipment Standardization Technical Committee (SAC/TC 328) | | Regulation (derived from) | National Standard Announcement No. 12 of 2021 | | Proposing organization | China Machinery Industry Federation | | Issuing agency(ies) | State Administration for Market Regulation, National Standardization Administration |
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