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Standards GB - Chinese national standards - Page 7587
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 4187-1984
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Tungsten rods
WITHDRAWN published on 9.3.1984
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GB/T 4188-1984
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Molybdenum rods
WITHDRAWN published on 9.3.1984
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GB/T 4189-1984
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Doped tungsten bars
WITHDRAWN published on 9.3.1984
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GB/T 4190-1984
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Doped molybdenum bars
WITHDRAWN published on 9.3.1984
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GB/T 4191-1984
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WITHDRAWN published on 1.1.1984
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GB/T 4194-1984
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Creep testing,high temperature treatment and metallographic examination of the tungsten wires
WITHDRAWN published on 9.3.1984
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GB/T 4197-1984
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Method for measuring the average grain size of sintered bar and rod of tungsten molybdenum and alloys
WITHDRAWN published on 9.3.1984
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GB 4198-1984
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Special technical terms in production of tungsten and molybdenum wires
WITHDRAWN published on 1.1.1984
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GB/T 4199-1984
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Rolling bearings--Tolerances-definitions
WITHDRAWN published on 15.3.1984
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GBJ 42-1981
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Specifications for the design of industrial enterprises communications
WITHDRAWN published on 6.5.1981
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