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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
Test conditions for numerically controlled turning machines and turning centres—Part 2:Geometric tests for machines with a vertical workholding spindle
Standard published on 28.12.2023
Selected format:Test conditions for numerically controlled turning machines and turning centres—Part 3: Geometric tests for machines with inverted vertical work-holding spindles
Standard published on 12.7.2017
Selected format:Test conditions for numerically controlled turning machines and turning centres - Part 4: Accuracy and repeatability of positioning of linear and rotary axes
Standard published on 26.7.2007
Selected format:Test conditions for numerically controlled turning machines and turning centres—Part 5:Accuracy of speeds and interpolations
Standard published on 31.10.2025
Selected format:Test conditions for numerically controlled turning machines and turning centers—Part 6: Accuracy of a finished test piece
Standard published on 12.7.2017
Selected format:Test conditions for numerically controlled turning machines and turning centres - Part 7: Evaluation of contouring performance in the coordinate planes
Standard published on 13.4.2009
Selected format:Test conditions for numerically controlled turning machines and turning centres - Part 8: Evaluation of thermal distortions
Standard published on 13.4.2009
Selected format:The method of subjective assessment of the sound quality for broadcast programmes and the technical parameters requirements
Standard published on 9.7.1996
Selected format:Semiconductor devices--Integrated circuits--Part 1:General
Standard published on 9.7.1996
Selected format:Sectional specification for film integrated circuits and hybrid film integrated circuits on the basis of the capability approval procedures
Standard published on 9.7.1996
Selected format:Latest update: 2026-06-12 (Number of items: 2 281 969)
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