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Standards GB - Chinese national standards - Page 174
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 12328-1990
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Legend and color standard for comprehensive engineering geological map
Standard published on 19.4.1990
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GB/T 12329-1990
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Karst geology terminology
Standard published on 19.4.1990
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GB/T 12332-2008
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Metallic coatings - Electroplated coatings of nickel for engineering purposes
Standard published on 19.6.2008
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GB/T 12333-2025
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Metallic coatings—Electroplated coatings of copper for engineering purposes
Standard published on 31.10.2025
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GB/T 12334-2001
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Metallic and other inorganic coatings--Definitions and conventions concerning the measurement of thickness
Standard published on 17.12.2001
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GB/T 12337-2014
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Steel spherical tanks
Standard published on 3.9.2014
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GB/T 12339-2008
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Inner packaging materials in preservation
Standard published on 27.5.2008
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GB/T 1234-2012
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High resistance alloys for electrical heating
Standard published on 5.11.2012
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GB/T 12340-2008
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Specifications for aerophotogrammetric office operation of 1:25 000 1:50 000 1:100 000 topographic maps
Standard published on 20.6.2008
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GB/T 12341-2008
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Specifications for aerophotogrammetric field work of 1:25 000 1:50 000 1:100 000 topographic maps
Standard published on 20.6.2008
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