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Standards GB - Chinese national standards - Page 8734
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 7852-1987
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Determination of total phosphorus in forest soil
WITHDRAWN published on 1.1.1987
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GB 7853-1987
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Determination of available phosphorus in forest soil
WITHDRAWN published on 1.1.1987
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GB 7854-1987
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Determination of total potassium in forest soil
WITHDRAWN published on 1.1.1987
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GB 7855-1987
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Determination of slow release potassium in forest soil
WITHDRAWN published on 1.1.1987
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GB 7856-1987
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Determination of available potassium in forest soil
WITHDRAWN published on 1.1.1987
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GB 7857-1987
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Determination of organic matter in forest soil and calculation of carbon-nitrogen ratio
WITHDRAWN published on 1.1.1987
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GB 7858-1987
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Determination of humus fractionation in forest soil
WITHDRAWN published on 1.1.1987
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GB 7859-1987
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Determination of pH value in forest soil
WITHDRAWN published on 1.1.1987
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GB 786-1976
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WITHDRAWN published on 1.1.1976
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GB/T 786.1-1993
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Fluid power systems and components—Graphic symbols and circuit diagrams—Part 1:Graphic symbols
WITHDRAWN published on 11.1.1993
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