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Standards GB - Chinese national standards - Page 8442
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 6135.4-1996
WITHDRAWN
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Parallel shank twist drills—Part 4:The types and dimensions for parallel shank long series twist drills
WITHDRAWN published on 5.7.1996
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GB/T 6135.5-1996
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Parallel shank twist drills—Part 5:The types and dimensions for extra long parallel shank twist drills
WITHDRAWN published on 5.7.1996
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GB 6136-1985
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Extra long parallel shank twist drills
WITHDRAWN published on 1.1.1985
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GB 6137-1985
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WITHDRAWN published on 1.1.1985
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GB 6138-1985
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WITHDRAWN published on 1.1.1985
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GB/T 6138.1-1997
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Subland twist drills for holes prior to tapping screw threads—Part 1:The types and dimensions for subland twist drills with parallel shanks
WITHDRAWN published on 28.8.1997
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GB/T 6138.1-2007
WITHDRAWN
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Subland twist drills for holes prior to tapping screw threads—Part 1:The types and dimensions of subland twist drills with cylindrical shanks
WITHDRAWN published on 25.6.2007
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GB/T 6138.2-1997
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Subland twist drills for holes prior to tapping screw threads—Part 2:The types and dimensions for subland twist drills with Morse shanks
WITHDRAWN published on 28.8.1997
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GB/T 6138.2-2007
WITHDRAWN
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Subland twist drills for holes prior to tapping screw threads—Part 2:The types and dimensions of subland twist drills with Morse typer shanks
WITHDRAWN published on 25.6.2007
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GB 6139-1985
WITHDRAWN
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WITHDRAWN published on 1.1.1985
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