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Standards GB - Chinese national standards - Page 245
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 12968-1991
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Eddy current decay method formeasurement of resistivity and residual resistance ratio of pure metals
Standard published on 4.6.1991
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GB/T 12969.1-2007
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Method of ultrasonic inspection for titanium and titanium alloy tubes
Standard published on 23.11.2007
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GB/T 12969.2-2007
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Method of eddy current inspection for titanium and titanium alloy tubes
Standard published on 23.11.2007
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GB/T 12970.1-2009
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Flexible copper stranded conductors for electrical purposes - Part 1: General requirements
Standard published on 19.3.2009
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GB/T 12970.2-2009
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Flexible copper stranded conductors for electrical purposes - Part 2: Flexible copper stranded conductors
Standard published on 19.3.2009
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GB/T 12970.3-2009
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Flexible copper stranded conductors for electrical purposes - Part 3: Flexible copper wire for antenna
Standard published on 19.3.2009
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GB/T 12970.4-2009
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Flexilbe copper stranded conductors for electrical purposes - Part 4: Copper wires for electric brush
Standard published on 19.3.2009
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GB/T 12971.1-2023
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Trolley and contact wires for electric traction—Part 1Copper and copper-alloy contact wires
Standard published on 6.8.2023
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GB/T 12971.2-2023
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Trolley and contact wires for electric traction—Part 2Aluminium and steel composite contact wires
Standard published on 6.8.2023
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GB/T 12972.1-2008
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Flexible rubber-sheathed cables for mining purposes - Part 1General requirements
Standard published on 30.6.2008
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