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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
Boat-grown gallium arsenide single crystals and As-cut slices
WITHDRAWN published on 31.3.1989
Selected format:Horizontal bridgman grown gallium arsenide single crystal and cutting wafer
WITHDRAWN published on 11.9.2007
Selected format:Gallium arsenide wafers by liquid phase epitaxy for Hall and Gunn devices
WITHDRAWN published on 1.1.1989
Selected format:Precious metals and their alloys--Bimetal electrical contacts of rivet type
WITHDRAWN published on 1.1.1989
Selected format:Precious metals and their alloys--Bimetal electrical contacts of rivet type
WITHDRAWN published on 31.3.1989
Selected format:As-sintered hardmetal blanks used in reducing dies for standard bolt
WITHDRAWN published on 1.1.1989
Selected format:As-sintered hardmetal blanks used in cold furging dies for hexagon nut
WITHDRAWN published on 1.1.1989
Selected format:As-sintered hardmetal blanks used in heading dies for standard bolt
WITHDRAWN published on 1.1.1989
Selected format:Specifications for the design of railway engineering-antiseismic design
WITHDRAWN published on 16.9.1987
Selected format:End mills with parallel shank
WITHDRAWN published on 1.1.1985
Selected format:Latest update: 2026-03-02 (Number of items: 2 264 418)
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