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Standards GB - Chinese national standards - Page 7926
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 4952-1985
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Coupler connection contour for locomotives and cars
WITHDRAWN published on 6.3.1985
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GB 4953-1985
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Slip joint pliers
WITHDRAWN published on 1.1.1985
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GB 4954-1985
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General symbols for ship design
WITHDRAWN published on 1.1.1985
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GB 4955-1985
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WITHDRAWN published on 1.1.1985
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GB/T 4955-1997
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Metallic coatings—Measurement of coating thickness—Coulometric method by anodic dissolution
WITHDRAWN published on 4.3.1997
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GB/T 4956-1985
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Non-magnetic coatings on magnetic substrates--Measurement of coating thickness--Magnetic method
WITHDRAWN published on 14.2.1985
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GB/T 4957-1985
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Non-conductive coatings on non-magnetic metal substrates--Measurement of coating thickness--Eddy current method
WITHDRAWN published on 14.2.1985
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GB/T 4958.1-1985
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Methods of measurement for equipment used in terrestrial radio-relay systems--Part 1: Measurement common to subsystems and simulated systems--Section One--General
WITHDRAWN published on 16.2.1985
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GB/T 4958.10-1988
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Methods of measurement for equipment used in terrestrial radio-relay systems--Part 3:Simulated systems--Section One General
WITHDRAWN published on 25.5.1988
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GB/T 4958.11-1988
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Methods of measurement for equipment used in terestrial radio-relay systems--Part 3:Simulated systems--Section Three Measurements for monochrome and colour television transmission
WITHDRAWN published on 25.5.1988
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