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Standards GB - Chinese national standards - Page 8280

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GB/T 5686.7-1988 WITHDRAWN

Methods for chemical analysis of silicomanganese alloy—The infrared absorption method for the determination of sulfur content

WITHDRAWN published on 21.2.1988

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GB/T 5686.8-1988 WITHDRAWN

Methods for chemical analysis of silicomanganese alloy—The combustion-neutralization titration method for the determination of sulfur content

WITHDRAWN published on 21.2.1988

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GB/T 5687.1-1985 WITHDRAWN

Methods for chemical analysis of ferrochromium—The ammonium persulfate oxidation volumetric method for the determination of chromium content

WITHDRAWN published on 4.12.1985

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GB/T 5687.2-1985 WITHDRAWN

Methods for chemical analysis of ferrochromium—The gravimetric method for the determination of silicon content

WITHDRAWN published on 4.12.1985

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GB/T 5687.2-2007 WITHDRAWN

Ferrochromium, silicochromium and nitrogen - bearing ferrochromium - Determination of silicon content - The perchloric acid dehydration gravimetric method

WITHDRAWN published on 11.9.2007

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