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Standards GB - Chinese national standards - Page 8183
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 5121.23-1996
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Copper and copper alloys—Determination of silicon content
WITHDRAWN published on 4.11.1996
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GB/T 5121.28-2010
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Method for chemical analysis of copper and copper alloys—Part 28:Determination of chromium,iron,manganese,cobalt,nickel,zinc,arsenic,selenium,silver,cadmium,tin,antimony,tellurium,lead and bismuth content—Inductively coupled plasma-mass spectrum method
WITHDRAWN published on 10.1.2011
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GB 5121.3-1985
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WITHDRAWN published on 1.1.1985
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GB/T 5121.3-1996
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Copper and copper alloys—Determination of lead content
WITHDRAWN published on 4.11.1996
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GB 5121.4-1985
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WITHDRAWN published on 1.1.1985
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GB/T 5121.4-1996
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Copper and copper alloys—Determination of carbon and sulfur content
WITHDRAWN published on 4.11.1996
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GB 5121.5-1985
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WITHDRAWN published on 1.1.1985
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GB/T 5121.5-1996
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Copper and copper alloys—Determination of nickel content
WITHDRAWN published on 4.11.1996
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GB 5121.6-1985
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WITHDRAWN published on 1.1.1985
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GB/T 5121.6-1996
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Copper and copperr alloys—Determination of bismuth content
WITHDRAWN published on 4.11.1996
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