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Standards GB - Chinese national standards - Page 4180

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 42666-2023E

Electronic dyed liquid crystal dimmable glass

Standard published on 6.8.2023

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GB/T 42667-2023

Test method for equibiaxial flexural strength of fine ceramics at room temperature—Ring-on-ring method

Standard published on 6.8.2023

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GB/T 42668-2023

Samarium-iron-nitrogen permanent magnetic powder for bonded magnet

Standard published on 6.8.2023

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GB/T 42668-2023E

Samarium-iron-nitrogen permanent magnetic powder for bonded magnet

Standard published on 6.8.2023

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GB/T 42669-2023

Corrosion resistant bulb flats for cargo oil tanks

Standard published on 6.8.2023

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GB/T 4267-2004

Rotating tools with parallel shanks--Diameters of shanks and sizes of driving squares

Standard published on 10.2.2004

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GB/T 42670-2023

Test method for Rockwell hardness of carbon materials

Standard published on 6.8.2023

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GB/T 42671-2023

Test method for surface roughness of carbon materials

Standard published on 6.8.2023

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GB/T 42672-2023

Corrosion of metals and alloys—Monitoring methods of environment factors for exposure corrosion tests in surface seawater

Standard published on 6.8.2023

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GB/T 42673-2023

Non-destructive testing of steel tubes—Magnetic particle inspection of seamless and welded ferromagnetic steel tubes for the detection of surface imperfections

Standard published on 6.8.2023

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