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Standards GB - Chinese national standards - Page 7655
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 4720-1984
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WITHDRAWN published on 1.1.1984
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GB/T 4721-1992
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General rules for copper-clad laminated sheets for printed circuits
WITHDRAWN published on 8.7.1992
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GB/T 4722-1992
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Test methods for copper-clad laminated sheets for printed circuits
WITHDRAWN published on 8.7.1992
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GB/T 4723-1992
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Phenolic cellulose paper copper-clad laminated sheets for printed circuits
WITHDRAWN published on 8.7.1992
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GB/T 4724-1992
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Epoxide cellulose paper copper-clad laminated sheets for printed circuits
WITHDRAWN published on 8.7.1992
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GB/T 4725-1992
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Epoxide woven glass fabric copper-clad laminated sheets for printed circuits
WITHDRAWN published on 8.7.1992
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GB/T 4726-1984
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Standard method of torsion test for resin cast
WITHDRAWN published on 20.10.1984
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GB 4727-1984
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Aneroid sphygmomanometer
WITHDRAWN published on 1.1.1984
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GB/T 4728.1-1985
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Graphical symbols for electrical diagrams--General imformation
WITHDRAWN published on 1.11.1985
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GB/T 4728.1-2005
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Graphical symbols for electrical diagrams—Part 1:General information
WITHDRAWN published on 3.3.2005
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