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Standards GB - Chinese national standards - Page 4986
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 5275.4-2014
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Gas analysis—Preparation of calibration gas mixtures using dynamic volumetric methods—Part 4: Continuous syringe injection method
Standard published on 8.7.2014
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GB/T 5275.5-2014
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Gas analysisPreparation of calibration gas mixtures using dynamic volumetric methodsPart 5: Capillary calibration devices
Standard published on 8.7.2014
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GB/T 5275.6-2023
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Gas analysis—Preparation of calibration gas mixtures using dynamic methods—Part 6:Critical flow orifices
Standard published on 17.3.2023
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GB/T 5275.7-2025
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Gas analysis—Preparation of calibration gas mixtures using dynamic methods— Part 7:Thermal mass-flow controllers
Standard published on 5.10.2025
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GB/T 5275.8-2014
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Gas analysisPreparation of calibration gas mixtures using dynamic volumetric methodsPart 8: Diffusion method
Standard published on 8.7.2014
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GB/T 5275.9-2014
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Gas analysisPreparation of calibration gas mixtures using dynamic volumetric methodsPart 9: Saturation method
Standard published on 8.7.2014
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GB/T 5276-2015
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Fasteners—Bolts, screws, studs and nuts—Symbols and descriptions of dimensions
Standard published on 10.12.2015
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GB/T 5277-1985
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Fasteners--Clearance holes for bolts and screws
Standard published on 1.8.1985
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GB/T 5278-1985
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Fasteners--Split pin holes and wireholes
Standard published on 1.8.1985
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GB/T 5279-1985
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Countersunk head screws--Head configuration and gauging
Standard published on 1.8.1985
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