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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
90°Countersinks--technical requirements
WITHDRAWN published on 28.3.1984
Selected format:Detachable pilots for use with counterbores and countersinks
WITHDRAWN published on 28.3.1984
Selected format:Rotating tools with parallel shanks—Diameters of shanks and sizes of driving squares
WITHDRAWN published on 28.3.1984
Selected format:Granhical symbols for agricultural machinery
WITHDRAWN published on 22.3.1984
Selected format:Graphical symbols for agricultural machinery--Part 2
WITHDRAWN published on 23.7.1987
Selected format:Tractors, machinery for agriculture and forestry, powered lawn and garden equipment—Symbols for operator controls and other displays—Part 2:Symbols for agricultural tractors and machinery
WITHDRAWN published on 5.6.2000
Selected format:Forestry machinery—Symbols for operator controls and other displays
WITHDRAWN published on 12.7.2006
Selected format:Test methods of stitching strength for printed and dyed fabrics
WITHDRAWN published on 20.6.1978
Selected format:Test methods for the thermal performance of flat plate solar collectors
WITHDRAWN published on 16.2.2000
Selected format:Test methods for the thermal performance of solar collectors
WITHDRAWN published on 8.11.2007
Selected format:Latest update: 2025-11-06 (Number of items: 2 243 364)
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