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Standards GB - Chinese national standards - Page 7752
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 9787-1988
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Hot-rolled equal—leg angle steel—Dimensions, shape, weight and tolerances
WITHDRAWN published on 5.9.1988
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GB/T 9788-1988
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Hot-rolled unequal—leg angle steel—Dimensions, shape, weight and tolerances
WITHDRAWN published on 5.9.1988
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GB/T 9789-1988
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Metallic and other non-organic coatings—Sulfur dioxide test with general condensation of moisture
WITHDRAWN published on 5.9.1988
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GB/T 9790-1988
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Metallic and related coatings—Vickers and Knoop microhardness tests
WITHDRAWN published on 5.9.1988
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GB/T 9790-2021
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Metallic materials—Vickers and Knoop microhardness tests of metallic and other inorganic coatings
WITHDRAWN published on 30.4.2021
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GB/T 9791-1988
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Chromate conversion coatings on zinc and cadmium--Test methods
WITHDRAWN published on 5.9.1988
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GB/T 9793-1997
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Metallic and other inorganic coatings—Thermal spraying—Zincaluminium and their alloys
WITHDRAWN published on 25.7.1997
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GB/T 9797-1997
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Metallic coatings—Electrodeposited coatings of nickel plus chromium and of copper plus nickel plus chromium
WITHDRAWN published on 27.6.1997
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GB/T 9797-2005
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Metallic coatings—Electroplated coatings of nickel plus chromium and of copper plus nickel plus chromium
WITHDRAWN published on 12.10.2005
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GB/T 9798-1997
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Metallic coatings—Electrodeposited coatings of nickel
WITHDRAWN published on 27.6.1997
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