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Standards GB - Chinese national standards - Page 5740
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 12684.10-1990
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Boric acid for industrial use—Determination of chromium content
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GB/T 12684.11-1990
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Boric acid for industrial use—Determination of cobalt content
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GB/T 12684.2-1990
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Boric acid for industrial use—Determination of insoluble substance content in water
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GB/T 12684.3-1990
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Boric acid for industrial use—Determination of sulphate content by reduction and titrimetry
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GB/T 12684.4-1990
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Boric acid for industrial use—Determination of sulphate content by visual turbidimetry
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GB/T 12684.5-1990
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Boric acid for industrial use—Determination of chloride content
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GB/T 12684.6-1990
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Boric acid for industrial use—Determination of iron content
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GB/T 12684.7-1990
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Boric acid for industrial use—Determination of ammonia content
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GB/T 12684.8-1990
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Boric acid for industrial use—Determination of heavy metal content
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GB/T 12684.9-1990
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Boric acid for industrial use—Determination of manganese content
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