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Standards GB - Chinese national standards - Page 5709
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
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GB/T 12171-1990
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Specification for TDM/FDM 60-channel Tran-multiplexing equipments used in the telecommunication network
WITHDRAWN published on 12.1.1990
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GB 12172-1990
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Software for computers in the safety systems of nuclear power stations
WITHDRAWN published on 1.1.1990
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GB/T 12173-1990
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Mining electrical apparatus for non hazardous area
WITHDRAWN published on 12.1.1990
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GB 12174-1990
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Air-arc gouging carbon electrodes
WITHDRAWN published on 1.1.1990
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GB 12175-1990
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Test methods for the measurement of the operational characteristics of brushes for electrical machines
WITHDRAWN published on 1.1.1990
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GB 12176-1990
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Sodium hypochlorite generator
WITHDRAWN published on 12.1.1990
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GB/T 12177-1990
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Numerical control of machines—NC processor output— Logical structure
WITHDRAWN published on 4.1.1990
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GB 12178-1990
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Urban trolleybus and tramway--Pole for power supply network
WITHDRAWN published on 1.1.1990
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GB/T 12179-1990
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General specifications of noise generators
WITHDRAWN published on 1.2.1990
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GB/T 1218-1987
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Depth micrometers
WITHDRAWN published on 30.9.1975
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