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Standards GB - Chinese national standards - Page 8661
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 7845-1987
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Determination of forest soil particle-size analysis (mechanical analysis)
WITHDRAWN published on 1.1.1987
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GB 7846-1987
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Determination of forest soil microaggregate
WITHDRAWN published on 1.1.1987
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GB 7847-1987
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Determination of forest soil macroaggregate
WITHDRAWN published on 1.1.1987
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GB 7848-1987
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Determination of total nitrogen in forest soil
WITHDRAWN published on 1.1.1987
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GB 7849-1987
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Determination of hydrolyzable nitrogen in forest soil
WITHDRAWN published on 1.1.1987
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GB 7850-1987
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Determination of nitrate nitrogen in forest soil
WITHDRAWN published on 1.1.1987
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GB 7851-1987
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Determination of ammonium nitrogen in forest soil
WITHDRAWN published on 1.1.1987
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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WITHDRAWN published on 1.1.1987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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