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Standards GB - Chinese national standards - Page 8639
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 7728-1987
WITHDRAWN
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Chemical analysis of metallurgical products--General rule for flame atomic absorption spectrometric methods
WITHDRAWN published on 12.5.1987
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GB/T 7729-1987
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Chemical analysis of metallurgical products--General rule for spectrophotometric methods
WITHDRAWN published on 12.5.1987
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GB/T 773-1993
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Specification of porcelain element for low voltage insulators
WITHDRAWN published on 20.4.1993
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GB/T 7730.1-1987
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Methods for chemical analysis of ferromanganese and blast furnace ferromanganese--The potentiometric method for the determination of manganese content
WITHDRAWN published on 12.5.1987
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GB/T 7730.1-2002
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Ferromanganese and blast furnace ferromanganese—Determination of manganese content—Potentiometric method and titrimetric method after ammonium nitrate oxidation
WITHDRAWN published on 11.9.2002
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GB/T 7730.2-1987
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Methods for chemical analysis of ferromanganese and blast furnace ferromanganese--The perchloric acid dehydration-gravimetric method for the determination of silicon content
WITHDRAWN published on 12.5.1987
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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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