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Standards GB - Chinese national standards - Page 8747
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 7920.9-2003
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Earth-moving machinery—Graders—Terminology and commercial specifications
WITHDRAWN published on 20.11.2003
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GB 7921-1987
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WITHDRAWN published on 1.1.1987
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GB/T 7921-1997
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Uniform color space and color difference formula
WITHDRAWN published on 4.5.1997
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GB/T 7922-1987
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Methods of measuring the colour of light source
WITHDRAWN published on 18.6.1987
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GB/T 7922-2003
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Method of measuring the color of light sources
WITHDRAWN published on 10.1.2003
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GB/T 7922-2008
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Method of measuring the color of light sources
WITHDRAWN published on 26.6.2008
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GB/T 7923-1987
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Surface grinding machines with vertical grinding wheel spindle and reciprocating table--Parameters
WITHDRAWN published on 11.6.1987
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GB/T 7923-2004
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Surface grinding machines with vertical grinding wheel spindle and reciprocating table—Parameters
WITHDRAWN published on 9.6.2004
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GB/T 7924-1987
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Optical projection profile grinding machines--Parameters
WITHDRAWN published on 11.6.1987
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GB/T 7924-2004
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Optical projection profile grinding machines—Parameters
WITHDRAWN published on 9.6.2004
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