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Standards GB - Chinese national standards - Page 193
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 12519-2021
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General specification of analytical instruments
Standard published on 11.10.2021
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GB/T 12520-1990
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Offset cruciform recess for rotary fastening devices
Standard published on 3.11.1990
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GB/T 12521-2008
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Technical requirements for air diving decompression
Standard published on 27.5.2008
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GB/T 12522-2009
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Stainless steel bellows expansion joints
Standard published on 9.3.2009
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GB 12523-2025
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Emission standard for construction noise
Standard published on 2.12.2025
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GB 12525-1990
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Emission standards and measurement methods of railway noise on the boundary alongside railway line
Standard published on 9.11.1990
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GB 12526-1990
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Specifications for long range electro-optical distance measurement
Standard published on 6.12.1990
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GB/T 12527-2008
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Aerial insulated cables for rated voltages up to and including 1kV
Standard published on 30.6.2008
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GB/T 12528-2008
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Rail vehicle cables with rated voltages up to and including 3kV
Standard published on 30.6.2008
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GB/T 12529.1-2008
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Graphic symbols and codes for grain and oil industry - Part 1: General items
Standard published on 4.11.2008
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