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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
Technical requirements for marine controllable pitch propellers
WITHDRAWN published on 30.3.1992
Selected format:Mixers, radio frequency, general specification for
WITHDRAWN published on 3.4.1992
Selected format:Switches(coaxial), RF transmission line, general specification for
WITHDRAWN published on 3.4.1992
Selected format:Contents list for scientific and technical periodicals
WITHDRAWN published on 13.4.1992
Selected format:Electromechanical switches for electronic equipment--Part 6: sectional specification--Sensitive switches
WITHDRAWN published on 2.11.1998
Selected format:Electromechanical switches for use in electronic equipment. Part 6: Sectional specification for sensitive switches. Section 1: Blank detail specification
WITHDRAWN published on 2.11.1998
Selected format:Limits of maximum permitted spurious emission power levels and methods of measurement for radio transmitters
WITHDRAWN published on 10.3.1992
Selected format:Power semiconductor converters Electrical test methods
WITHDRAWN published on 13.4.1992
Selected format:Criteria for the evaluation of software used for industry control
WITHDRAWN published on 6.4.1992
Selected format:Specifications for microfilm processors
WITHDRAWN published on 16.4.1992
Selected format:Latest update: 2026-01-23 (Number of items: 2 257 393)
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