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Standards GB - Chinese national standards - Page 7623
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 4677.5-1984
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Test methods of platness for printed boards
WITHDRAWN published on 25.7.1984
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GB/T 4677.6-1984
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Test methods for thickness of metal and oxide coating by microscopical examination of cross-section
WITHDRAWN published on 25.7.1984
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GB/T 4677.7-1984
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Test methods of plating adhesion by adhesive type for printed boards
WITHDRAWN published on 25.7.1984
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GB/T 4677.8-1984
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Test methods of plating and coating thickness by beta backscattering for printed boards
WITHDRAWN published on 25.7.1984
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GB/T 4677.9-1984
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The electrographic test method of plating porosity for printed boards
WITHDRAWN published on 25.7.1984
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GB/T 4678.1-1984
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Die-cast die components--Mold plates
WITHDRAWN published on 27.9.1984
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GB/T 4678.1-2003
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Die-casting die components—Part 1:Mould plate
WITHDRAWN published on 23.7.2003
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GB/T 4678.10-1984
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Die-cast die components--Guide bushings for ejector plate
WITHDRAWN published on 27.9.1984
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GB/T 4678.10-2003
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Die-casting die components—Part 10:Ejector guide bush
WITHDRAWN published on 23.7.2003
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GB/T 4678.11-1984
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Die-cast die components--Ejector pins
WITHDRAWN published on 27.9.1984
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