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Standards GB - Chinese national standards - Page 8663
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 7862-1987
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Determination of lime requirement in forest soil
WITHDRAWN published on 1.1.1987
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GB 7863-1987
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Determination of cation exchange capacity in forest soil
WITHDRAWN published on 1.1.1987
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GB 7864-1987
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Determination of total exchangeable base in forest soil
WITHDRAWN published on 1.1.1987
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GB 7865-1987
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Determination of exchangeable calcium and magnesium in forest soil
WITHDRAWN published on 1.1.1987
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GB 7866-1987
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Determination of exchangeable potassium and sodium in forest soil
WITHDRAWN published on 1.1.1987
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GB 7867-1987
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Calculation of bast-saturation percentage in forest soil
WITHDRAWN published on 1.1.1987
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GB 7868-1987
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Determination of exchangeable sodium in alkaline soil
WITHDRAWN published on 1.1.1987
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GB 7869-1987
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Calculation of soil alkalinity
WITHDRAWN published on 1.1.1987
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GB/T 787-1974
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Dimensions of electronic tube bases
WITHDRAWN published on 23.10.1974
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GB 7870-1987
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Determination of calcium carbonate in forest soil
WITHDRAWN published on 1.1.1987
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