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Standards GB - Chinese national standards - Page 8737
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 7878-1987
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Determination of available molybdenum in forest soil
WITHDRAWN published on 1.1.1987
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GB 7879-1987
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Determination of available copper in forest soil
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GB 788-1987
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WITHDRAWN published on 1.1.1987
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GB 7880-1987
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Determination of available zinc in forest soil
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GB 7881-1987
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Determination of available iron in forest soil
WITHDRAWN published on 1.1.1987
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GB 7882-1987
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Determination of exchangeable manganese in forest soil
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GB 7883-1987
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Determination of easy reducible manganese in forest soil
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GB 7884-1987
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Preparation of forest plant and forest floor samples
WITHDRAWN published on 1.1.1987
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GB 7885-1987
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Determination of crude ash content in forest plant and forest floor
WITHDRAWN published on 1.1.1987
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GB 7886-1987
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Determination of total nitrogen in forest plant and forest floor (kjeldahl method)
WITHDRAWN published on 1.1.1987
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