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Standards GB - Chinese national standards - Page 100
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 11223.1-1989
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Analytical determination of uranium in ash of biological samples--Solid fluorimetry
Standard published on 31.3.1989
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GB/T 11224-1989
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Analytical method of thorium in water
Standard published on 31.3.1989
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GB/T 11225-1989
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Analytical method of plutonium in water
Standard published on 31.3.1989
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GB/T 11228-2008
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Fundamental parameters for kitchens and related equipments in housing
Standard published on 4.11.2008
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GB 11236-2021
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Copper-bearing contraceptive intrauterine devices—Requirements and tests
Standard published on 1.12.2021
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GB 11239.1-2005
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Operation microscopes Part1:Requirements and test methods
Standard published on 24.1.2005
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GB/T 11239.1-2025
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Optics and photonics—Operation microscopes—Part 1: Requiremnts and test methods
Execute Date: july 2027
Standard published on 30.6.2025
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GB/T 1124.1-2007
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Convex and concave milling cutters - Part1The types and dimensions
Standard published on 25.6.2007
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GB/T 1124.2-2007
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Convex and concave milling cutters - Part 2Technical specifications
Standard published on 25.6.2007
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