Standards GB - Chinese national standards - Page 5141

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 6881.2-2017

Acoustics—Determination of sound power levels and sound energy levels of noise sources using sound pressure—Engineering methods for small movable sources in reverberant fields—Comparison method for a hard-walled test room

Standard published on 1.11.2017

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GB/T 6882-2016

Acoustics—Determination of sound power levels and sound energy levels of noise sources using sound pressure—Precision methods for anechoic rooms and hemi-anechoic rooms

Standard published on 24.2.2016

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GB/T 6883-2017

Cemented carbide sintering body for wire, bar or tube drawing dies—Dimensions

Standard published on 29.9.2017

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