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Standards GB - Chinese national standards - Page 8693
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 8721-1988
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Method for the determination of tensile strength of carbonaceous materials
WITHDRAWN published on 22.2.1988
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GB/T 8721-2009
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Method for the determination of tensile strength of carbonaceous materials
WITHDRAWN published on 8.7.2009
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GB/T 8722-1988
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Method for the determination of thermal conductivity of graphite materials at median temperature
WITHDRAWN published on 22.2.1988
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GB/T 8722-2008
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Method for the determination of thermal conductivity of graphite materials at median temperature
WITHDRAWN published on 13.5.2008
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GB 8723-1988
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High pure graphite materials--Determination of chlorines content--Spectrophotometric method
WITHDRAWN published on 1.1.1988
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GB 8724-1988
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High pure graphite materials--Determination of total rare earths content--Spectrophotometric method
WITHDRAWN published on 1.1.1988
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GB 8725-1988
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Dimensions of the carbon block for blast furnaces
WITHDRAWN published on 1.1.1988
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GB 8726-1988
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Method for determination of content of quinoline-insoluble of modified pitch
WITHDRAWN published on 1.1.1988
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GB/T 8727-1988
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Method for determination of coking value of coal pitch
WITHDRAWN published on 22.2.1988
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GB 8728-1988
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WITHDRAWN published on 1.1.1988
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