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Standards GB - Chinese national standards - Page 4522

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 45322.1-2025

Particle—Separation performance test for particle size separator—Part 1: General principles

Standard published on 28.2.2025

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GB/T 45322.2-2025

ParticleSeparation performance test for particle size separator—Part 2: Divided flow method

Standard published on 28.2.2025

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GB/T 45322.3-2026

ParticleSeparation performance test for particle size separatorPart 3Static chamber method

Standard published on 28.1.2026

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GB/T 45323-2025

Coding rules for urban heating system identification

Standard published on 28.2.2025

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GB/T 45324-2025

Determination of powder resistivity for cathode materials of lithium ion battery

Standard published on 28.2.2025

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GB/T 45325-2025

Determination of length of heat affected zone for precious metal bonding wire—Scanning electron microscope method

Standard published on 28.2.2025

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GB/T 45326-2025

Extra coarse grain cemented carbide tips for engineering

Standard published on 28.2.2025

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GB/T 45327-2025

Lithium-rich lithium iron oxide

Standard published on 28.2.2025

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GB/T 45328-2025

Determination of magnetic foreign metal particles in lithium carbonate, lithium hydroxide monohydrate and lithium chloride—Cleanliness meter test method

Standard published on 28.2.2025

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GB/T 45329-2025

Precious metals and their alloys wrought for ignition electrodes

Standard published on 28.2.2025

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