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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
Arrangement, types and basic dimensions for electronic equipment consoles
WITHDRAWN published on 17.2.1987
Selected format:Denomination for turbochargers and code of identification symbols
WITHDRAWN published on 12.7.1985
Selected format:Methods of measurement for photomultiplier tubes
WITHDRAWN published on 19.2.1987
Selected format:Methods of measurement for phototubes
WITHDRAWN published on 19.2.1987
Selected format:-
WITHDRAWN published on 1.1.1987
Selected format:Measurement of the electrical properties of disk-seal tubes--General
WITHDRAWN published on 1.1.1987
Selected format:Measurements of the electrical properties of disk-seal tubes--Measuring methods of the frequency-response characteristic
WITHDRAWN published on 1.1.1987
Selected format:Measurements of the electrical properties of disk-seal tubes--Measuring methods of the frequency position
WITHDRAWN published on 1.1.1987
Selected format:Measurements of the electrical properties of disk-seal tubes--Measuring methods of resonator unloaded Q
WITHDRAWN published on 1.1.1987
Selected format:Measurements of the electrical properties of disk-seal tubes--Measuring methods of self-neutralization frequency
WITHDRAWN published on 1.1.1987
Selected format:Latest update: 2026-04-02 (Number of items: 2 270 295)
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