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Standards GB - Chinese national standards - Page 7609
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 4324.11-1984
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Methods for chemical analysis oftungsten--The chromazurol S photometric method for the determination of aluminium content
WITHDRAWN published on 12.4.1984
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GB/T 4324.12-1984
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Methods for chemical analysisof tungsten--The chlorization-molybdenum blue photometric method for the determination of silicon content
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GB/T 4324.13-1984
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Methods for chemical analysis of tungsten--The glyoxal bis (2-hydroxyanil) photometric method for the determination of calcium content
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GB/T 4324.14-1984
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Methods for chemical analysis of tungsten--The atomic absorption spectrophotometric method for the determination of calcium content
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GB/T 4324.15-1984
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Methods for chemical analysisof tungsten--The chlorophosphonazo photometric method for the determination of magnesium content
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GB/T 4324.16-1984
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Methods for chemical analysis of tungsten--The atomic absorption spectrophotometric method for the determination of magnesium content
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GB/T 4324.17-1984
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Methods for chemical analysis of tungsten--The atomic absorption spectrophotometric method for the determination of sodium content
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GB/T 4324.18-1984
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Methods for chemical analysis of tungsten--The atomic absorption spectrophotometric method for the determination of potassium content
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GB/T 4324.19-1984
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Methods for chemical analysis of tungsten--The diantipyrylmethane photometric method for the determination of titanium content
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GB/T 4324.2-1984
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Methods for chemical analysis of tungsten--The potassium iodide-brucine photometric method for thedetermination of bismuth content
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