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Standards GB - Chinese national standards - Page 5589
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 12209.1-1990
WITHDRAWN
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Determination of naphthalene of gas in urban area—Picric acid method
WITHDRAWN published on 4.1.1990
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GB/T 12209.2-1990
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Determination of naphthalene of gas in urban area—Gas chromatographic method
WITHDRAWN published on 4.1.1990
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GB/T 1221-1992
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Heat-resisting steel bars
WITHDRAWN published on 16.11.1992
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GB/T 12210-1990
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Determination for ammonia of gas in urban area
WITHDRAWN published on 4.1.1990
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GB/T 12211-1990
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Determination of hydrogen sulfide of gas in urban area
WITHDRAWN published on 4.1.1990
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GB/T 12212-1990
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Technical drawings Dimensions, proportions and simplified representation for welding symbols
WITHDRAWN published on 12.1.1990
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GB/T 12214-1990
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Silica sand and flour for investment casting
WITHDRAWN published on 12.1.1990
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GB/T 12215-1990
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Bauxite sand and flour for investment casting
WITHDRAWN published on 12.1.1990
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GB/T 12216-1990
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The residue from distillation of synthetic fatty acids as binder for foundry
WITHDRAWN published on 12.1.1990
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GB/T 12217-1990
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Machines—Shaft heights
WITHDRAWN published on 9.1.1990
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