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Standards GB - Chinese national standards - Page 966
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 18613-2020E
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Minimum allowable values of energy efficiency and values of efficiency grades for motors
Standard published on 29.5.2020
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GB 18614-2012
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Fire extinguishing agent heptafluoropropane(HFC227ea)
Standard published on 31.12.2012
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GB/T 18615-2002
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Non-alloyed and stainless steel fittings for corrugated flexible metallic hoses
Standard published on 10.1.2002
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GB/T 18616-2002
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Corrugated flexible metallic hose assmeblies for the protection of electrical cables in explosive atomspheres
Standard published on 10.1.2002
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GB/T 18617.1-2002
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Technical product documentation--Organization and naming of layers for CAD--Part 1:Overview andprinciples
Standard published on 10.1.2002
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GB/T 18618-2009
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Geometrical product specifications (GPS) - Surface texture - Profile method - Motif parameters
Standard published on 15.11.2009
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GB/T 18619.1-2002
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Natural gas--Determination ofwater by the Karl fischer method--Coulometric procedure
Standard published on 14.1.2002
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GB/Z 18620.1-2025
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Code of inspection practice—Part 1:Measurement of cylindrical gear tooth flanks
Standard published on 3.12.2025
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GB/Z 18620.2-2008
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Cylindrical gears—Code of inspection practice—Part 2:Inspection related to radial composite deviations,runout,tooth thickness and backlash
Standard published on 31.3.2008
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GB/Z 18620.3-2008
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Cylindrical gears—Code of inspection practice—Part 3:Recommendations relative to gear blanks,shaft centre distance and parallelism of axes
Standard published on 31.3.2008
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