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GA/T 1948-2021 English PDF

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GA/T 1948-2021: Forensic sciences - Technical specifications for identification of bullet traces on glasses
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PDF similar to GA/T 1948-2021


Standard similar to GA/T 1948-2021

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Basic data

Standard ID GA/T 1948-2021 (GA/T1948-2021)
Description (Translated English) Forensic sciences - Technical specifications for identification of bullet traces on glasses
Sector / Industry Public Security (Police) Industry Standard (Recommended)
Classification of Chinese Standard A92
Classification of International Standard 13.310
Word Count Estimation 7,715
Date of Issue 2021-10-14
Date of Implementation 2022-05-01
Issuing agency(ies) Ministry of Public Security

GA/T 1948-2021: Forensic sciences - Technical specifications for identification of bullet traces on glasses


---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.
ICS 13.310 CCSA92 People's Republic of China Public Security Industry Standards forensic science Technical specification for inspection of bullet marks on glass bullet trace son glasses 2022-05-01 Implementation Released by the Ministry of Public Security of the People's Republic of China

foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1.Structure and Drafting Rules for Standardization Documents" drafting. Please note that some contents of this document may refer to patents. The issuing agency of this document assumes no responsibility for identifying patents. This document was proposed by the National Criminal Technology Standardization Technical Committee Trace Inspection Sub-Technical Committee (SAC/TC179/SC9) and submitted Focus on. This document is drafted by. China Criminal Police Academy. The main drafters of this document. Yu Aoyang, Wang Lu, Shen Yuntao, Lu Xiaosen, Yang Jun, Pei Zhiguang. forensic science Technical specification for inspection of bullet marks on glass

1 Scope

This document specifies the content and method of inspection of bullet marks on flat glass. This document is applicable to gun-related cases, accidents and incidents where regular flat glass and buoyant firearms with rifled barrels are Inspection of bullet marks formed by French glass.

2 Normative references

The contents of the following documents constitute the essential provisions of this document through normative references in the text. Among them, dated references For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to this document. GB/T 29349 On-site photography and video requirements GA/T 903-2010 Extraction and packaging methods of trace material evidence glass GA/T 955-2011 Rules for Extraction, Packaging and Inspection of Forensic Firearms Evidence

3 Terms and Definitions

The following terms and definitions apply to this document. 3.1 gunshot bullet hole In the process of gun shooting, the hole-shaped trace formed when the projectile invades and penetrates the object. 3.2 crack fissure Under the impact of projectiles, the fracture distribution of glass is formed because the stress peak value is greater than the glass strength limit. 3.3 radiating fissure Cracks distributed radially around the point of action. 3.4 tangential fissure A ring-shaped or arc-shaped crack with a certain length as the radius centered on the point of action. 3.5 end fissure When the radiation crack expands, it terminates at the front of the crack inside the glass due to energy attenuation. 3.6 glass powder circle glasspowdercircle The ring-shaped area made of glass fragments located on the inner edge of the bullet hole in the glass.

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