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Standards GB - Chinese national standards - Page 7948
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 4699.2-1984
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Methods for chemical analysis of silicochromium--The alkaline fusion-ammonium persulfate oxidation volumetric method for the determination of chromium content
WITHDRAWN published on 4.10.1984
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GB/T 4699.2-2008
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Ferrochromium and ferrosilicochromium - Determination of chromium content - The ammonium persulfate oxidation titrimetric method and potentiometric titration method
WITHDRAWN published on 13.5.2008
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GB/T 4699.3-1984
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Methods for chemical analysisof silicochromium--The molybdenum blue photometric method for the determination of phosphorus content
WITHDRAWN published on 4.10.1984
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GB/T 4699.4-1988
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Methods for chemical analysis of silicochromium—The infrared absorption method for the determination of carbon content
WITHDRAWN published on 21.2.1988
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GB/T 4699.5-1988
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Methods for chemical analysis of silicochromium--The coulometric method for the determination of carbon content
WITHDRAWN published on 1.1.1988
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GB/T 4699.6-1988
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Methods for chemical analysis of silicochromium—The infrared absorption method for the determination of sulfur content
WITHDRAWN published on 21.2.1988
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GB/T 4699.7-1988
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Methods for chemical analysis of silicochromium—The combustion-neutralization titration method for the determination of sulfur content
WITHDRAWN published on 21.2.1988
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GBJ 47-1983
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Acoustics-sound-abserbin coefficient measurement by method of reverbration room (Trial)
WITHDRAWN published on 5.1.1983
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GB 470-1983
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WITHDRAWN published on 1.1.1983
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GB/T 470-1997
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Zinc ingots
WITHDRAWN published on 16.6.1997
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