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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
Bubble classes for optical elements
WITHDRAWN published on 17.4.1987
Selected format:Method of verification for vertical balancing machines
WITHDRAWN published on 20.4.1987
Selected format:-
WITHDRAWN published on 1.1.1987
Selected format:-
WITHDRAWN published on 1.1.1987
Selected format:General terminology for transducers
WITHDRAWN published on 20.4.1987
Selected format:Nomenclature and code for transducers
WITHDRAWN published on 20.4.1987
Selected format:The dose of X-rays leakage from electron microscope
WITHDRAWN published on 13.8.1996
Selected format:The dose of X-rays leakage from electron microscope
WITHDRAWN published on 20.11.2003
Selected format:Sheathed thermocouple materials
WITHDRAWN published on 1.1.1987
Selected format:Standard test method for sheathed thermocouple materials
WITHDRAWN published on 1.1.1987
Selected format:Latest update: 2026-03-30 (Number of items: 2 269 988)
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