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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
Steel ball machining machines--Parameters
WITHDRAWN published on 1.1.1989
Selected format:-
WITHDRAWN published on 1.1.1989
Selected format:Relieving lathes—Testing of the accuracy
WITHDRAWN published on 31.3.1989
Selected format:Spline shaft grinding machines—Parameters
WITHDRAWN published on 31.3.1989
Selected format:Spline shaft grinding machines—Parameters
WITHDRAWN published on 9.6.2004
Selected format:Numerically controlled machine tools--Determination of accuracy and repeatability of positioning
WITHDRAWN published on 1.1.1989
Selected format:Thread micrometers
WITHDRAWN published on 31.3.1989
Selected format:Screw thread micrometer
WITHDRAWN published on 10.2.2004
Selected format:Straight sided two-point mechanical presses—Testing of the accuracy
WITHDRAWN published on 25.3.1989
Selected format:Sheep shearers--Types and basic parameters
WITHDRAWN published on 1.1.1989
Selected format:Latest update: 2026-01-28 (Number of items: 2 257 539)
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