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Standards GB - Chinese national standards - Page 4204
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/Z 42842.1-2023
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Fine bubble technology—Cleaning applications—Part 1: Test method for cleaning salt(NaCl)-stained surfaces
Standard published on 6.8.2023
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GB/T 42842.2-2023
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Fine bubble technology—Cleaning applications—Part 2: Test method for cleaning machine-oil stained surfaces of machined metal parts
Standard published on 6.8.2023
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GB/T 42842.3-2026
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Fine bubble technology—Cleaning applications—Part 3:Test method for cleaning hard flooring surfaces
Execute Date: november 2026
Standard published on 30.4.2026
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GB/T 42843.1-2023
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Fine bubble technology—Sampling and sample preparation for measurement—Part 1: Ultrafine bubble dispersion in water
Standard published on 6.8.2023
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GB/T 42844-2023
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Fine bubble technology—Storage and transportation of ultrafine bubble dispersion in water
Standard published on 6.8.2023
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GB/T 42845.1-2023
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Fine bubble technology—Characterization of microbubbles—Part 1: Off-line evaluation of size index
Standard published on 6.8.2023
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GB/T 42846-2023
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Space environment—Method of ground simulation for space radiation effect on non-metallic materials
Standard published on 6.8.2023
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GB/T 42847.2-2023
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Energy storage systems using fuel cell modules in reverse mode—Part 2: Test procedures for the performance of single cells and stacks with proton exchange membranes,including reversible operation
Standard published on 6.8.2023
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GB/T 42847.3-2023
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Energy storage systems using fuel cell modules in reverse mode—Part 3: Test procedures for the performance of energy storage systems
Standard published on 7.9.2023
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GB/T 42848-2023
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Semiconductor intergrated circuits—Test method of direct digital frequency synthesizer
Standard published on 6.8.2023
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