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Standards GB - Chinese national standards - Page 6236
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 16553-2003
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Gems—Testing
WITHDRAWN published on 1.7.2003
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GB/T 16553-2010
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Gems—Testing
WITHDRAWN published on 26.9.2010
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GB/T 16554-1996
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Diamond Grading
WITHDRAWN published on 7.10.1996
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GB/T 16554-2003
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Diamond grading
WITHDRAWN published on 1.7.2003
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GB/T 16554-2010
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Diamond grading
WITHDRAWN published on 26.9.2010
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GB/T 16555-2008
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Chemical analysis of refractories containing carbon and silicon carbide or nitride
WITHDRAWN published on 26.6.2008
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GB/T 16555.1-1996
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Chemical analysis for silicon carbide refractories—Determination of silicon carbide—Absorb gravimetric method
WITHDRAWN published on 27.9.1996
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GB/T 16555.2-1996
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Chemical analysis for silicon carbide refractories—Determination of silicon carbide—Gas volumetric method
WITHDRAWN published on 27.9.1996
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GB/T 16555.3-1996
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Chemical analysis for silicon carbide refractories—Determination of free silicon—Gas volumetric method
WITHDRAWN published on 27.9.1996
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GB/T 16555.4-1996
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Chemical analysis for silicon carbide refractories—Determination of alumina—EDTA gas volumetric method
WITHDRAWN published on 27.9.1996
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