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Standards GB - Chinese national standards - Page 8549
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 7224-1987
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Varnished cotton cloths
WITHDRAWN published on 1.1.1987
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GB 7225-1987
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Polyester varnished glass cloths
WITHDRAWN published on 1.1.1987
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GB 7226-1987
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Silicon varnished glass cloths
WITHDRAWN published on 1.1.1987
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GB 7227-1987
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WITHDRAWN published on 1.1.1987
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GB/T 7227-1999
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Graphical symbols for forestry machinery
WITHDRAWN published on 25.1.1999
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GB 7228-1987
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Measuring and calculating method on efficiency of rectifiers and their consumers energy-conversion efficiency in electro-chemical industry
WITHDRAWN published on 3.2.1987
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GB 7229-1987
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Sucker rods and their couplings
WITHDRAWN published on 1.1.1987
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GB 7230-1987
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Gas detector tube units
WITHDRAWN published on 4.2.1987
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GB 7231-1987
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Basic identification colours and code indications for industrial pipelines
WITHDRAWN published on 4.2.1987
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GB/T 7231-2003
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Basic identification colors and code indications and safety sign for industrial pipelines
WITHDRAWN published on 13.3.2003
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