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Standards GB - Chinese national standards - Page 5116
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 6620-2009
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Test method for measuring warp on silicon slices by noncontact scanning
Standard published on 30.10.2009
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GB/T 6621-2009
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Testing methods for surface flatness of silicon slices
Standard published on 30.10.2009
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GB/T 6624-2009
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Standard method for measuring the surface quality of polished silicon slices by visual inspection
Standard published on 30.10.2009
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GB/T 6627-1986
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Designations for lumbered synthetic quartz crystals
Standard published on 29.7.1986
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GB/T 664-2011
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Chemical reagent - Iron()sulfate heptahydrate
Standard published on 12.5.2011
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GB/T 6643-1986
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General purpose rigid coaxial transmission lines and their associated flange connectors--Generic specification
Standard published on 31.7.1986
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GB/T 6645-2008
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Granulated electric furnace phosphorous slag used for cement
Standard published on 30.6.2008
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GB/T 6646-2008
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Chrysotile asbestos test methods
Standard published on 20.8.2008
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GB/T 6648-1986
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Blank detail specification for semiconductor inte-grated circuit static read/write memories
Standard published on 31.7.1986
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GB/T 665-2007
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Chemical reagent - Copper() Sulfate pentahydrate
Standard published on 26.9.2007
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