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Standards GB - Chinese national standards - Page 5192
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 7408.2-2025
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Date and time—Representation for information interchange—Part 2:Extensions
Standard published on 31.10.2025
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GB/T 7409.1-2024
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Excitation systems for synchronous machines—Part 1: Definitions
Standard published on 23.8.2024
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GB/T 7409.2-2020
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Excitation systems for synchronous machines—Part 2 Models for power system studies
Standard published on 2.6.2020
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GB/T 7409.3-2007
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Excitation system for synchronous electrical machines - Technical requirements of excitation system for large and medium synchronous generators
Standard published on 16.1.2007
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GB/T 7409.4-2023
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Excitation systems for synchronous machines—Part 4Technical requirements of excitation systems for medium and small synchronous machines
Standard published on 7.9.2023
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GB/T 7410.1-2025
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Vitreous and porcelain enamels—Terminology—Part 1: Terms and definitions
Standard published on 31.10.2025
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GB 7411-2009
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Quarantine protocol for cotton seeds in producing areas
Standard published on 27.4.2009
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GB 7412-2003
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Plant quarantine rules for wheat seeds in producing areas
Standard published on 2.6.2003
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GB 7413-2009
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Quarantine protocol for propagating tubers and seedlings of sweet potato in producing areas
Standard published on 27.4.2009
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GB/T 7414-1987
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Seed packing of main agricultural crops
Standard published on 16.3.1987
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