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Standards GB - Chinese national standards - Page 7778
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 4374.6-1984
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Methods for chemical analysis of magnesium powders and aluminium-magnesium alloy powders--The gravi-metric method for the determination of hygroscopic moisture content
WITHDRAWN published on 30.4.1984
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GB/T 4374.7-1984
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Methods for chemical analysis of magnesium powders and aluminium-magnesium alloy powders--The gravimetric method for the determination of insoluble content in hydrochloric acid
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GB/T 4374.8-1984
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Methodsfor chemical analysis of magnesium powders and aluminium-magnesium alloy powders--The gaso-metric method for the determination of active magnesium and active aluminium-magnesium contents
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GB/T 4375.1-1984
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Methods for chemical analysis of gallium--The 29-dimethyl-47-diphenyl-110-phenanthroline photometric method for the determination of copper content
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GB/T 4375.10-1984
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Methods for chemical analysis of gallium--The atomic absorption spectrophotometric method for the determination of zinc content
WITHDRAWN published on 30.4.1984
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GB/T 4375.11-1984
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Methods for chemical analysis of gallium--The cold vapor atomic absorption spectrophotometric method for the determination of mercury content
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GB/T 4375.12-1984
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Methods for chemical analysis of gallium--The spectro-chemical method for the determination ofleadcoppernickelaluminiumindium and zinc contents
WITHDRAWN published on 30.4.1984
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GB/T 4375.2-1984
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Methods for chemical analysis of gallium--The 4-(2-pyridylazo)-resorcinol photometric method for the determination of lead content
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GB/T 4375.3-1984
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Methods for chemical analysis of gallium--The chromazurol S-tetradecyl pyridine bromide photometric method for the determination of aluminium content
WITHDRAWN published on 30.4.1984
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GB/T 4375.4-1984
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Methods for chemical analysis of gallium--The 47-diphenyl-110-phenanthroline photometric method for the determination of iron content
WITHDRAWN published on 30.4.1984
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