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Standards GB - Chinese national standards - Page 7067
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 223.4-1988
WITHDRAWN
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Methods for chemical analysis of iron, steel and alloy The volumetric method for determination of manganese content by ammonium nitrate oxidation
WITHDRAWN published on 18.1.1988
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GB/T 223.40-1985
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Methods for chemical analysis of iron, steel and alloy—The anion-exchange separation-sulphochlorophenol S photometric method for the determination of niobium content
WITHDRAWN published on 18.7.1985
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GB/T 223.43-1985
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WITHDRAWN published on 1.1.1985
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GB/T 223.43-1994
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Methods for chemical analysis of iron, steel and alloy—Determination of tungsten content
WITHDRAWN published on 26.9.1994
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GB 223.44-1985
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Methods for chemical analysis of iron, steel and alloy--The tetraphenylarsonium chloride-thiocyanate-trichloromethane extraction photometric method for the determination of tungsten content
WITHDRAWN published on 1.1.1985
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GB 223.45-1985
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Methods for chemical analysis of iron, steel and alloy--The cupral separation-xylidyl blue 2 photometric method for the determination of magnesium content
WITHDRAWN published on 1.1.1985
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GB/T 223.45-1994
WITHDRAWN
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Methods for chemical analysis of iron, steel and alloy—The cupral separation-xylidyl blue photometric method for the determination of magnesium content
WITHDRAWN published on 26.9.1994
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GB 223.47-1985
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methods for chemical analysis of iron, steel and alloy--The carrier precipitation-molybdenum blue photometric method for the determination of antimony content
WITHDRAWN published on 1.1.1985
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GB/T 223.48-1985
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Methods for chemical analysis of iron, steel and alloy—The semixylenol orange photometric method for the determination of bismuth content
WITHDRAWN published on 18.7.1985
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GB 223.5-1988
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WITHDRAWN published on 1.1.1988
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