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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
The confidence limits of quantile and coefficient of variation for normal distribution
Standard published on 15.10.2009
Selected format:Cylindrical gears—ISO system of flank tolerance classification—Part 1:Definitions and allowable values of deviations relevant to flanks of gear teeth
Standard published on 12.10.2022
Selected format:Cylindrical gears—ISO system of flank tolerance classification—Part 2: Definitions and allowable values of double flank radial composite deviations
Standard published on 6.8.2023
Selected format:Accuracy of rack
Standard published on 12.10.2022
Selected format:Slotted raised countersunk head wood screws
Standard published on 2.7.1986
Selected format:Buoy shackle
Standard published on 10.12.1988
Selected format:Marine magnetic compass of class B
Standard published on 30.12.2011
Selected format:Cycloidal drives Part 1: Basic terminology
Standard published on 3.9.2012
Selected format:Cycloidal drives Part 2: Representation of drawings
Standard published on 3.9.2012
Selected format:Cycloidal drives Part 3: Symbols of geometrical data
Standard published on 3.9.2012
Selected format:Latest update: 2024-12-23 (Number of items: 2 217 157)
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