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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
Test method for current proof of conductors on printed board
WITHDRAWN published on 2.4.1987
Selected format:Test methods for voltage proof of surface layers on printed boards
WITHDRAWN published on 2.4.1987
Selected format:Test methods for current proof of plated-through holes on printed boards
WITHDRAWN published on 2.4.1987
Selected format:An artificial ear of wide band type for the calibration of earphones used in audiometry
WITHDRAWN published on 2.4.1987
Selected format:CATV System—Antenna part
WITHDRAWN published on 3.4.1987
Selected format:Equivalence between binary notation symbols and the significant conditions of a two-condition code
WITHDRAWN published on 3.4.1987
Selected format:Power levels for data transmission overtelephone lines
WITHDRAWN published on 3.4.1987
Selected format:Current ratings for high and low voltage electrical apparatus
WITHDRAWN published on 1.1.1980
Selected format:Standard current
WITHDRAWN published on 31.3.1996
Selected format:Characteristics of distortion and error-rate measuring apparatus for data transmission
WITHDRAWN published on 3.4.1987
Selected format:Latest update: 2026-06-14 (Number of items: 2 282 206)
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