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Standards GB - Chinese national standards - Page 8681
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 8648.5-1988
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Cobalt--Determination of phosphorus content--Molybdenum blue spectrophotometric method
WITHDRAWN published on 1.1.1988
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GB 8648.6-1988
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Cobalt--Determination of magnesium content--Flame atomic absorption spectrophotometric method
WITHDRAWN published on 1.1.1988
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GB 8648.7-1988
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Cobalt--Determination of zinc content--Flame atomic absorption spectrophotometric method
WITHDRAWN published on 1.1.1988
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GB 8648.8-1988
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Cobalt--Determination of cadmium content--Flame atomic absorption spectrophotometric method
WITHDRAWN published on 1.1.1988
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GB 8648.9-1988
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Cobalt--Determination of lead content--Flame atomic absorption spectrophotometric method
WITHDRAWN published on 1.1.1988
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GB/T 8649-1988
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Rolling balls
WITHDRAWN published on 5.2.1988
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GB/T 8650-1988
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Test method of pipeline steels for resistance to step wise cracking
WITHDRAWN published on 5.2.1988
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GB/T 8650-2006
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Evaluation of pipeline and pressure vessel steels for resistance to hydrogen-induced cracking
WITHDRAWN published on 2.3.2006
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GB/T 8651-1988
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The inspection method of ultrasonic plate wave for the metal plates
WITHDRAWN published on 5.2.1988
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GB/T 8651-2002
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Metal plates—Flaw detection method by the ultrasonic plate wave
WITHDRAWN published on 15.7.2002
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