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Standards GB - Chinese national standards - Page 7561
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 4097.4-1983
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Ammonium sulphate--Determination of free acid content--Titrimetric method
WITHDRAWN published on 1.1.1983
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GB 4097.5-1983
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Ammonium sulphate--Determination of iron content--0-phenanthroline photometric method
WITHDRAWN published on 1.1.1983
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GB 4097.6-1983
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Ammonium sulphate--Determination of arsenic content--Silver diethyl dithiocarbamate photometric method
WITHDRAWN published on 1.1.1983
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GB 4097.7-1983
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Ammonium sulphate--Determination of arsenic content--Gutzeit method
WITHDRAWN published on 1.1.1983
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GB 4097.8-1983
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Ammonium sulphate--Determination of heavy metal content--Visible turbidimetric method
WITHDRAWN published on 1.1.1983
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GB 4097.9-1983
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Ammonium sulphate--Determination of water insolubles--Gravimetric method
WITHDRAWN published on 1.1.1983
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GB/T 4098.1-1983
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Test method of corona for radio-frequency cables
WITHDRAWN published on 1.1.1983
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GB/T 4098.10-1983
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Test method of dimensional stability for radio-frequency cables
WITHDRAWN published on 1.1.1983
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GB/T 4098.2-1983
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Methods for measurement of capacitance and capacitance unbalance for radio-frequency cables
WITHDRAWN published on 1.1.1983
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GB/T 4098.3-1983
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Methods of measurement of characteristic impedance for radio-frequency cables
WITHDRAWN published on 1.1.1983
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