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Standards GB - Chinese national standards - Page 7637
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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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WITHDRAWN published on 5.1.1983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WITHDRAWN published on 1.1.1983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WITHDRAWN published on 16.6.1997
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GB/T 4700.1-1984
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Methods for chemical analysis of calcium-silicon--The perchloric acid dehydration-gravimetric method for the determination of silicon content
WITHDRAWN published on 4.10.1984
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GB/T 4700.2-1988
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Methods for chemical analysis of calcium-silicon—The EDTA titrimetric method for the determination of calcium content
WITHDRAWN published on 20.9.1988
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GB/T 4700.3-1984
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Methods for chemical analysisof calcium-silicon--The EDTA titrimetric method for the determination of aluminium content
WITHDRAWN published on 4.10.1984
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GB 4700.4-1984
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WITHDRAWN published on 1.1.1984
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GB/T 4700.4-1998
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Methods for chemical analysis of calcium-silicon—The phosphomolybdenum blue photometric method for the determination of phosphorus content
WITHDRAWN published on 7.12.1998
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GB 4700.5-1988
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WITHDRAWN published on 1.1.1988
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GB/T 4700.5-1998
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Methods for chemical analysis of calcium-silicon—The infrared absorption method for the determination of carbon content
WITHDRAWN published on 7.12.1998
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