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Standards GB - Chinese national standards - Page 8550
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 7232-1999
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Terminology of metal heat treatment
WITHDRAWN published on 3.9.1999
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GB/T 7232-2012
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Terminology of metal heat treatment
WITHDRAWN published on 3.9.2012
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GB/T 7233-1987
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Methods for ultrasonic testing and for specifying quality levels of steel castings
WITHDRAWN published on 4.2.1987
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GB/T 7233.1-2009
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Steel castings—Ultrasonic examination—Part 1:Steel castings for general purposes
WITHDRAWN published on 30.10.2009
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GB/T 7233.2-2010
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Steel castings—Ultrasonic examination—Part 2:Steel castings for highly stressed components
WITHDRAWN published on 23.12.2010
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GB/T 7234-1987
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Measurement of roundness—Terms, definitions and parameters of roundness
WITHDRAWN published on 4.2.1987
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GB/T 7235-1987
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Methods for the assessment of departure from roundness—Measurement of variations in radius
WITHDRAWN published on 4.2.1987
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GB 7236-1987
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WITHDRAWN published on 1.1.1987
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GB 7237-1987
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Chrome blanks
WITHDRAWN published on 1.1.1987
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GB 7238-1987
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Method of testing surface flatness of the glass substrate and chromium film
WITHDRAWN published on 1.1.1987
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