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Standards GB - Chinese national standards - Page 8974
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 7660.2-1987
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Reflecting prisms--Classificationcode name and chart
WITHDRAWN published on 20.6.1987
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GB/T 7660.3-1987
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Reflecting prisms--Characteristics of image rotation
WITHDRAWN published on 20.6.1987
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GB/T 7661-1987
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Bubble classes for optical elements
WITHDRAWN published on 17.4.1987
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GB/T 7662-1987
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Method of verification for vertical balancing machines
WITHDRAWN published on 20.4.1987
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GB 7663-1987
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WITHDRAWN published on 1.1.1987
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GB 7664-1987
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WITHDRAWN published on 1.1.1987
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GB/T 7665-1987
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General terminology for transducers
WITHDRAWN published on 20.4.1987
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GB/T 7666-1987
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Nomenclature and code for transducers
WITHDRAWN published on 20.4.1987
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GB 7667-1996
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The dose of X-rays leakage from electron microscope
WITHDRAWN published on 13.8.1996
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GB 7667-2003
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The dose of X-rays leakage from electron microscope
WITHDRAWN published on 20.11.2003
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