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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
Accuracy of optical transfer functionOTFmeasurement
Standard published on 30.9.2009
Selected format:D.C.magnetoelectric galvanometer
Standard published on 4.11.1992
Selected format:The measurement of coating thickness for electro-deposited nickel coatings on magnetic and non-magnetic substracts
Standard published on 4.11.1992
Selected format:Classification and code of disciplines
Standard published on 6.5.2009
Selected format:Safety and hygiene code for working with lead
Standard published on 23.12.2008
Selected format:Methods for chemical analysis of zirconium and zirconium alloys—Part 1Determination of tin content—Potassium iodate titration and phenylfluorone-polyethylene glycoloctyl phenyl ether spectrophotometry
Standard published on 29.9.2017
Selected format:Methods for chemical analysis of zirconium and zirconium alloys—Part 10Determination of tungsten content—Thiocyanate spectrophotometry and inductively coupled plasma atomic emission spectrometry
Standard published on 12.10.2022
Selected format:Methods for chemical analysis of zirconium and zirconium alloys—Part 11: Determination of molybdenum content—Thiocyanate spectrophotometry
Standard published on 29.9.2017
Selected format:Methods for chemical analysis of zirconium and zirconium alloys—Part 12Determination of silicon content—Molybdenum blue spectrophotometry
Standard published on 31.12.2019
Selected format:Methods for chemical analysis of zirconium and zirconium alloys—Part 13: Determination of lead content—Polarography
Standard published on 29.9.2017
Selected format:Latest update: 2026-04-06 (Number of items: 2 271 069)
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