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Standards GB are Chinese national standards, which are issued by China's Standardization Administration Office (SAC).
Chinese national standards are used all over China commonly labeled as GB standards. They determine the united production requirements regarding product safety and quality .
GB standards are often modified or created according to the international standards of ISO, IEC or any other international level.
Although, they are largely harmonized, GB standards may differ from international standards .
Approximately 15% of all GB standards are obligatory and they can be identified according to the prefix GB, after which the code of the standards follows:
GB – Obligatory national standards
GB/T – Optional national standards
GB/Z – National steering technical document
Basic dimensions and performance for No. 15 coupler
WITHDRAWN published on 1.1.1987
Selected format:Basic dimensions and parameters of yoke for No. 15 coupler
WITHDRAWN published on 1.1.1987
Selected format:Presentation of theses and dissertations
WITHDRAWN published on 5.12.2006
Selected format:Presentation of scientific and technical report
WITHDRAWN published on 30.9.2009
Selected format:Descriptive rules for bibliographic references
WITHDRAWN published on 5.5.1987
Selected format:Rules for contentform and structure of bibliographic references
WITHDRAWN published on 23.3.2005
Selected format:Ethylene for industrial use--Specification
WITHDRAWN published on 9.5.1987
Selected format:Ethylene for industrial use—Specification
WITHDRAWN published on 9.6.2003
Selected format:Pyopylene for industrial use - Specification
WITHDRAWN published on 9.5.1987
Selected format:Propylene for industrial use—Specification
WITHDRAWN published on 15.10.2002
Selected format:Latest update: 2026-03-30 (Number of items: 2 269 988)
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