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Standards GB - Chinese national standards - Page 7785
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 4411-1984
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Document facsimile transmission (group 2) in telephone network
WITHDRAWN published on 1.1.1984
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GB 4412-1984
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Methods for heat-measuring of mechanical cement shaft kilns
WITHDRAWN published on 1.1.1984
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GB 4413-1984
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Calculation of heat balance for mechanical cement shaft kilns
WITHDRAWN published on 1.1.1984
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GB/T 4414-1984
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Methods of sampling and sample preparation of tungsten concentrates in bags
WITHDRAWN published on 29.5.1984
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GB 4415-1984
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Fire clay refractory bricks
WITHDRAWN published on 1.1.1984
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GB 4416-1987
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Fire clay refractory bricks for hot-blast stoves
WITHDRAWN published on 1.1.1987
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GB 4417-1987
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Fire clay refractory bricks for glass furnaces
WITHDRAWN published on 1.1.1987
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GB 4418-1984
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Fire clay refractory bricks for casting
WITHDRAWN published on 1.1.1984
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GB 4419-1984
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Dimensions of refractory bricks for casting
WITHDRAWN published on 1.1.1984
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GB 442-1964
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WITHDRAWN published on 1.1.1964
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