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Standards GB - Chinese national standards - Page 8480
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 6907-2005
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Analysis of water used in boil and cooling system—The sampling method of water
WITHDRAWN published on 6.2.2005
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GB/T 6908-1986
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Methods for analysis of water for boiler and for cooling--The determination of electrical conductivity for water
WITHDRAWN published on 16.9.1986
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GB/T 6908-2005
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Analysis of water used in boil and cooling system—The determination of electrical conductivity for water
WITHDRAWN published on 6.2.2005
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GB/T 6908-2008
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Analysis of water used in boil and cooling system—Determination of electrical conductivity
WITHDRAWN published on 1.4.2008
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GB/T 6909-2008
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Analysis of water used in boiler and cooling system—Determination of hardness
WITHDRAWN published on 1.4.2008
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GB/T 6909.1-1986
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Methods for analysis of water for boiler and for cooling—The determination of hardness—High hardness
WITHDRAWN published on 16.9.1986
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GB/T 6909.2-1986
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Methods for analysis of water for boiler and for cooling—The determination of hardness—Low hardness
WITHDRAWN published on 16.9.1986
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GB 691-1977
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WITHDRAWN published on 1.1.1977
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GB/T 691-1994
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Chemical reagent—Aniline
WITHDRAWN published on 22.12.1994
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GB/T 6910-1986
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Methods for analysis of water for boiler and for cooling—The determination of calcium—Complexometric titration
WITHDRAWN published on 16.9.1986
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