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Standards GB - Chinese national standards - Page 5068
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 6133.1-2006
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Tool chucks for flated parallel shank tools - part 1: Dimensions of the driving system of tool shanks
Standard published on 20.7.2006
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GB/T 6133.2-2006
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Tool chucks for flated parallel shank tools - Part 2: Connecting dimensions of chucks and designation
Standard published on 20.7.2006
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GB/T 6135.1-2008
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Parallel shank twist drills - Part 1: The types and dimensions for small type twist drills with oversize parallel shank
Standard published on 4.11.2008
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GB/T 6135.2-2008
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Parallel shank twist drills - Part 2: The types and dimensions for parallel shank stub series twisl drills and parallel shank jobber series twist drills
Standard published on 4.11.2008
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GB/T 6135.3-2008
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Parallel shank twist drills - Part 3: The types and dimensions for parallel shank long series twist drills
Standard published on 4.11.2008
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GB/T 6135.4-2008
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Parallel shank twist drills - Part 4: The types and dimensions for extra long parallel shank twist drills
Standard published on 4.11.2008
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GB/T 6138-2023
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Subland twist drills for holes prior to tapping screw threads
Standard published on 7.9.2023
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GB/T 6139-2007
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Subland twist drills - Technical specifications
Standard published on 26.7.2007
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GB/T 614-2021
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Chemical reagent—General method for the determination of refractive index
Standard published on 20.8.2021
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GB 6141-2008
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Quality grading of legume seeds
Standard published on 9.4.2008
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