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Standards GB - Chinese national standards - Page 8399
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 593-1993
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Marine bronze and cast iron flanged cocks
WITHDRAWN published on 24.5.1993
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GB 5930-1986
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Thickness testing method of the metal deposits for the light industrial products--Spot test
WITHDRAWN published on 1.1.1986
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GB 5931-1986
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Thickness testing method of the metal deposits and conversion coatings for the light industrial products--Beta Ray backscattering
WITHDRAWN published on 1.1.1986
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GB 5932-1986
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Wear-resistant testing method of the metal deposits and conversion coatings for the light industrial products
WITHDRAWN published on 1.1.1986
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GB 5933-1986
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Adhesion testing method of the metal deposits for the light industrial products
WITHDRAWN published on 1.1.1986
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GB 5934-1986
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Hardness testing method of the metal deposits for the light industrial products--Microscopic hardness tester method
WITHDRAWN published on 1.1.1986
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GB 5935-1986
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Porosity testing method of the metal deposits for the light industrial products
WITHDRAWN published on 1.1.1986
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GB 5936-1986
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Testing method of the chemical protective coatings of the ferrous metal for the light industrial products--Dipping spot test
WITHDRAWN published on 1.1.1986
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GB 5937-1986
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Testing method of the white chromatic conversion coatings existence and the corrosion resistance of the zinc deposits for the light industrial products
WITHDRAWN published on 1.1.1986
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GB 5938-1986
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Corrosion-resistant testing method of the metal deposits and conversion coatings for the light industrial products--Neutral salt spraying test (NSS)
WITHDRAWN published on 1.1.1986
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