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Standards GB - Chinese national standards - Page 6226
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 14137-1993
WITHDRAWN
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Optical fiber mechanical—type splice insertion loss test
WITHDRAWN published on 4.2.1993
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GB/T 14138-1993
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Requirements for aerial optical fiber cable systems joined to national public telecommunication network
WITHDRAWN published on 4.2.1993
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GB/T 14139-1993
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Silicon epitaxial wafers
WITHDRAWN published on 6.2.1993
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GB/T 14139-2009
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Silicon epitaxial wafers
WITHDRAWN published on 30.10.2009
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GB/T 1414-1978
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General purpose screw threads for joints on pipe line--Dimensions
WITHDRAWN published on 15.8.1978
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GB/T 1414-2003
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General purpose metric screw threads—The plan for pipe systems
WITHDRAWN published on 22.5.2003
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GB/T 14140-2009
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Test method for measuring diameter of semiconductor wafer
WITHDRAWN published on 30.10.2009
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GB/T 14140.1-1993
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Silicon slices and wafers—Measuring of diameter—Optical projecting method
WITHDRAWN published on 6.2.1993
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GB/T 14140.2-1993
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Silicon slices and wafers—Measuring of diameter—Micrometer method
WITHDRAWN published on 6.2.1993
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GB/T 14141-1993
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Test method for sheet resistance of silicon epitaxial, diffused and ion-implanted layers using a collinear four-probe array
WITHDRAWN published on 6.2.1993
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