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Standards GB - Chinese national standards - Page 7763
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 4324.6-1984
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Methods for chemical analysisof tungsten--The ortho-phenanthroline photometric method for the determination iron content
WITHDRAWN published on 12.4.1984
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GB/T 4324.7-1984
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Methods for chemical analysis of tungsten--The 5-Cl-PADAB photometric method for the determination of cobalt content
WITHDRAWN published on 12.4.1984
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GB/T 4324.8-1984
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Methods for chemical analysis of tungsten--The dimethylglyoxime photometric method for the determination of nickel content
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GB/T 4324.9-1984
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Methods for chemical analysis of tungsten--The dimethylglyoxime gravimetric method for the determination of nickel content
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GB/T 4325.1-1984
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Methods for chemical analysis of molybdenum--The square wave polarographic method for the successive determination of lead and cadmium content
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GB/T 4325.10-1984
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Methods for chemical analysis of molybdenum--The neocuproin photometric method for the determination of copper content
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GB/T 4325.11-1984
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Methods for chemical analysis ofmolybdenum--The chromazurol S photometric method for the determination of aluminium content
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GB/T 4325.12-1984
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Methods for chemical analysisof molybdenum--The chlorization-molybdenum blue photometric method for the determination of silicon content
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GB/T 4325.13-1984
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Methods for chemical analysis of molybdenum--The glyoxal bis (2-hydroxyanil) photometric method for the determination of calcium content
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GB/T 4325.14-1984
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Methods for chemical analysis of molybdenum--The atomic absorption spectrophotometric method for the determination of calcium content
WITHDRAWN published on 12.4.1984
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