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Standards GB - Chinese national standards - Page 5194
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 777-2008
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Analogue pneumatic signal for industrial-process measurement and control instruments
Standard published on 30.6.2008
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GB/T 7771-2008
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Measurement of special metamerism index - Change in illuminant
Standard published on 18.9.2008
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GB/T 7774-1987
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Methods of measurement of the performance characteristics of turbo-molecular pumps
Standard published on 23.5.1987
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GB/T 7774-2007
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Vacuum technology -Turbomolecular pumps - Measurement of performance characteristics
Standard published on 20.12.2007
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GB/T 7777-2021
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Measurement and evaluation of mechanical vibration of displacement compressors
Standard published on 31.12.2021
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GB/T 7778-2017
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Number designation and safety classification of refrigerants
Standard published on 12.5.2017
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GB/T 7779-2018
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Centrifuge—Model designation
Standard published on 14.5.2018
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GB/T 778.1-2018
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Meters for cold potable water and hot water—Part 1:Metrological requirements and technical requirements
Standard published on 7.6.2018
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GB/T 778.2-2018
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Meters for cold potable water and hot water—Part 2:Test methods
Standard published on 7.6.2018
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GB/T 778.3-2018
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Meters for cold potable water and hot water—Part 3:Test report format
Standard published on 7.6.2018
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