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Standards GB - Chinese national standards - Page 5905
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/Z 18620.1-2002
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Cylindrical gears—Code of inspection practice—Part 1:Inspection of corresponding flanks of gear teeth
WITHDRAWN published on 10.1.2002
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GB/Z 18620.2-2002
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Cylindrical gears—Code of inspection practice—Part 2:Inspection related to radial composite deviations,runout,tooth thickness and backlash
WITHDRAWN published on 10.1.2002
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GB/Z 18620.3-2002
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Cylindrical gears—Code of inspection practice—Part 3:Recommendations relative to gear blanks,shaft centre distance and parallelism of axes
WITHDRAWN published on 10.1.2002
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GB/Z 18620.4-2002
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Cylindrical gears—Code of inspection practice—Part 4:Recommendations relative to surface texture and tooth contact pattern checking
WITHDRAWN published on 10.1.2002
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GB/T 18621-2002
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Design regulation on greenhouse ventilation and cooling
WITHDRAWN published on 16.1.2002
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GB/T 18622-2002
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Greenhouse structure design load
WITHDRAWN published on 16.1.2002
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GB 18623-2002
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Zhen jiang vinegar
WITHDRAWN published on 28.1.2002
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GB 18624-2002
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Shuijingfang liquor
WITHDRAWN published on 28.1.2002
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GB/T 1863-1989
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Iron oxide red pigments
WITHDRAWN published on 31.3.1989
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GB/T 18631-2002
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Textile fibre—North sky light daylighting for classing rooms
WITHDRAWN published on 28.1.2002
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