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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
Telephone parameters--Equivalence series standard
WITHDRAWN published on 1.1.1980
Selected format:Methods for determining the physical and mechanical properties of coal and rock—Part 1:General requirements for sampling
WITHDRAWN published on 8.4.2009
Selected format:Methods for determining the physical and mechanical properties of coal and rock—Part 11:Methods for determining shear strength of coal and rock
WITHDRAWN published on 26.9.2010
Selected format:Methods for determining the physical and mechanical properties of coal and rock—Part 12:Methods for determining coal hardiness coefficient
WITHDRAWN published on 26.9.2010
Selected format:Methods for determining the physical and mechanical properties of coal and rock—Part 8:Methods for determining the deformation parameters of coal and rock
WITHDRAWN published on 8.4.2009
Selected format:Telephone parameters--Measuring methods of equivalence
WITHDRAWN published on 1.1.1980
Selected format:Abrasive blasting equipment—General technical requirements
WITHDRAWN published on 13.4.2009
Selected format:Methods for crack opening displacement testing
WITHDRAWN published on 1.1.1980
Selected format:Test method for crack-tip opening displacement measurement of metallic materials
WITHDRAWN published on 12.10.1994
Selected format:Storage equipment for loose bulk materials - Safety code
WITHDRAWN published on 13.4.2009
Selected format:Latest update: 2026-04-10 (Number of items: 2 271 455)
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