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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
Measuring methods of electrical properties of continuous wave magnetrons
Standard published on 29.6.1988
Selected format:Spacers for self-locking nutssingleluganchor
Standard published on 22.12.1988
Selected format:Spacers for self-locking nutstwoluganchor
Standard published on 22.12.1988
Selected format:Spacers for self-locking nutsangleanchor
Standard published on 22.12.1988
Selected format:Dimensions of pot-cores made of magnetic oxides and associated parts
Standard published on 5.11.2012
Selected format:Measuring methods for properties of gyromagnetic materials intended for application at microwave frequencies
Standard published on 31.12.2012
Selected format:Ferrite cores--Guide on the limits of surface irregularities--Part 1:General specification
Standard published on 4.12.2002
Selected format:Ferrite cores--Guide on the limits of surface irregularities--Part 3:ETD-cores and E-cores
Standard published on 4.12.2002
Selected format:Ferrite cores-Guide on the limits of surface irregularities - Part 4: Ring-cores
Standard published on 9.2.2007
Selected format:Ferrite cores—Guideline on the limits of surface irregularities—Part 8: PQ-cores
Standard published on 15.3.2018
Selected format:Latest update: 2026-04-19 (Number of items: 2 274 482)
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