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Standards GB - Chinese national standards - Page 7803
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 4511.1-1984
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Coke—Determination of show porosity
WITHDRAWN published on 28.6.1984
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GB 4511.2-1984
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WITHDRAWN published on 1.1.1984
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GB/T 4511.3-1984
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Coke—Determination of apparent relative density and total porosity
WITHDRAWN published on 28.6.1984
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GB/T 4511.4-1984
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Coke—Determination of true relative density
WITHDRAWN published on 28.6.1984
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GB 4512-1984
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Skid bricks and lower blocks for the small heating furnaces--Determination of silicon carbide
WITHDRAWN published on 1.1.1984
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GB/T 4513-2000
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Classification of unshaped refractory materials
WITHDRAWN published on 17.11.2000
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GB 4514-1984
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Rules for designation and identification of types of sewing machines
WITHDRAWN published on 1.1.1984
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GB/T 4515-1984
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Stitch types—classification and terminology
WITHDRAWN published on 23.6.1984
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GB 4516-1984
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WITHDRAWN published on 1.1.1984
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GB/T 4516-1995
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Household sewing machines—Determination of sewing capacity
WITHDRAWN published on 5.5.1995
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