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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
Helium mass spectrometer leak detector
WITHDRAWN published on 17.12.1992
Selected format:-
WITHDRAWN published on 1.1.1978
Selected format:Density meters utilizing ionizing radiation
WITHDRAWN published on 17.12.1992
Selected format:Design general requirements for wind energy conversion system
WITHDRAWN published on 17.12.1992
Selected format:The reflective projection screens
WITHDRAWN published on 9.11.1998
Selected format:The reflective and transmitting projection screens
WITHDRAWN published on 31.5.2005
Selected format:The reflective and transmitting projection screens
WITHDRAWN published on 31.10.2011
Selected format:Micrographics—Visual density specifications for diazo and vesicular films
WITHDRAWN published on 17.12.1992
Selected format:Operating force and strength of camera
WITHDRAWN published on 19.12.1992
Selected format:Photoelectric method for measuring exposure in focal planes of camera
WITHDRAWN published on 19.12.1992
Selected format:Latest update: 2026-04-14 (Number of items: 2 272 146)
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