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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
Series and products of nonlinear circuits for semiconductor integrated circuits—Products of voltage/frequency and frequency/voltage converters
WITHDRAWN published on 28.4.1991
Selected format:Generic specification of twisted nematic liquid crystal display devices
WITHDRAWN published on 28.4.1991
Selected format:Blank detail specification of twisted nematic liquid crystal displays for watches
WITHDRAWN published on 28.4.1991
Selected format:-
WITHDRAWN published on 1.1.1977
Selected format:Blank detail specification of twisted nematic liquid crystal displays for calculators
WITHDRAWN published on 28.4.1991
Selected format:Blank detail specification of twisted nematic liquid crystal displays for instruments
WITHDRAWN published on 28.4.1991
Selected format:Generic specification for magnetrons
WITHDRAWN published on 1.1.1991
Selected format:Blank detail specification for continuous wave magnetrons
WITHDRAWN published on 1.1.1991
Selected format:Generic specification for piezoelectric ceramic resonators for use in electronic equipment
WITHDRAWN published on 28.4.1991
Selected format:-
WITHDRAWN published on 1.1.1977
Selected format:Latest update: 2026-06-09 (Number of items: 2 281 484)
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