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Standards GB - Chinese national standards - Page 270
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 13265.1-1997
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Fiber optic isolators--Part 1:Generic specification
Standard published on 5.10.1997
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GB/T 13266-1991
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Water quality--Determination of the acute toxicity of substance to Daphnia (Daphnia magna straus)
Standard published on 11.11.1991
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GB/T 13267-1991
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Water quality--Determination of the acute toxicity of substance to a freshwater fish (Brachydanio rerio Hamilton-Buchanan)
Standard published on 11.11.1991
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GB/T 13268-1991
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Atmospheric air--Test dust standard sample--Loess dust
Standard published on 14.11.1991
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GB/T 13269-1991
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Atmospheric air--Test dust standard sample--Fly ash
Standard published on 14.11.1991
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GB/T 13270-1991
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Atmospheric air--Test dust standardsample--Simulated atmospheric dust
Standard published on 14.11.1991
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GB 13271-2014
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Emission standard of air pollutants for boiler
Standard published on 16.5.2014
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GB/T 13277.1-2023
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Compressed air—Part 1Contaminants and purity classes
Standard published on 23.5.2023
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GB/T 13277.2-2015
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Compressed air—Part 2: Test methods for oil aerosol content
Standard published on 31.12.2015
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GB/T 13277.3-2015
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Compressed air—Part 3: Test methods for measurement of humidity
Standard published on 31.12.2015
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