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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
Geometrical Product Specifications(GPS)--Measurement of roundness--Termsdefinitions and parameters of roundness
Standard published on 11.11.2004
Selected format:Geometrical Product Specifications(GPS)--Methods for the assessment of departure from roundness--Measurement of variations in radius
Standard published on 11.11.2004
Selected format:Centering error of lenses
Standard published on 1.12.2010
Selected format:Single coil spring lock washersHeavy type
Standard published on 5.2.1987
Selected format:Curved single coil spring lock washers
Standard published on 5.2.1987
Selected format:Wave single coil spring lock washers
Standard published on 5.2.1987
Selected format:Safety of laser products—Part 1: Equipment classification and requirements
Standard published on 29.9.2024
Selected format:Safety of laser products—Part 12: Safety of free space optical communication systems used for transmission of information
Standard published on 28.1.2026
Selected format:Safety of laser products—Part 13:Measurements for classification of laser products
Standard published on 13.7.2018
Selected format:Safety of laser products—Part 14: A user""s guide
Standard published on 1.8.2025
Selected format:Latest update: 2026-08-04 (Number of items: 2 291 378)
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