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Standards GB - Chinese national standards - Page 5865
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/T 13255.5-1991
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Caprolactam for industrial use—Determination of absorbance at a wavelength of 290nm
WITHDRAWN published on 9.11.1991
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GB/T 13255.6-1991
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Caprolactam for industrial use—Determination of acidity or alkalinity
WITHDRAWN published on 9.11.1991
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GB/T 13255.7-1991
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Caprolactam for industrial use—Determination of iron content
WITHDRAWN published on 9.11.1991
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GB/T 13255.8-1991
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Caprolactam for industrial use—Determination of cyclohexanone oxime content
WITHDRAWN published on 9.11.1991
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GB/T 13256-1991
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Urea for industrial use -Determination of sulphate conent -Visible turbidimetric method
WITHDRAWN published on 1.1.1991
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GB/T 13257-1991
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Urea for industrial use - Determination of ash - Weight method
WITHDRAWN published on 1.1.1991
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GB/T 13258-1991
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Technical phosphorus pentasulfide
WITHDRAWN published on 9.11.1991
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GB/T 13258-2008
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Technical phosphorus pentasulfide
WITHDRAWN published on 4.6.2008
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GB/T 13259-1991
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High pressure sodium lamps
WITHDRAWN published on 29.10.1991
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GB/T 13259-2005
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High pressure sodium lamps
WITHDRAWN published on 18.1.2005
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