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Standards GB - Chinese national standards - Page 8712
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 7730.2-2002
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Ferromanganese and blast furnace ferromanganese—Determination of silicon content—Gravimetric method after perchloric acid dehydration
WITHDRAWN published on 11.9.2002
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GB 7730.3-1987
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WITHDRAWN published on 1.1.1987
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GB/T 7730.3-1997
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Methods for chemical analysis of ferromanganese The determination of phosphorus content
WITHDRAWN published on 11.11.1997
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GB 7730.4-1987
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WITHDRAWN published on 1.1.1987
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GB/T 7730.5-2000
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Methods for chemical analysis of ferromanganese and blast furnace ferromanganese The infrared absorption method for the determination of carbon content
WITHDRAWN published on 17.11.2000
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GB/T 7730.6-1988
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Methods for chemical analysis of ferromanganese and blast furnace ferromanganese The gasometric method for the determination of carbon content
WITHDRAWN published on 21.2.1988
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GB/T 7730.7-1988
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Methods for chemical analysis of ferromanganese and blast furnace ferromanganese—The gravimetric method for the determination of carbon content
WITHDRAWN published on 21.2.1988
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GB/T 7730.8-1988
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Methods for chemical analysis of ferromanganese and blast furnace ferromanganese--The infrared absorption method for determination of sulfur content
WITHDRAWN published on 1.1.1988
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GB/T 7730.8-2000
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Methods for chemical analysis of ferromanganese and blast furnace ferromanganese-The infrared absorption method for the determination of sulfur content
WITHDRAWN published on 17.11.2000
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GB/T 7730.9-1988
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Methods for chemical analysis of ferromanganese and blast furnace ferromanganese The combustion-neutralization titration method for the determination of sulfur content
WITHDRAWN published on 21.2.1988
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