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Standards GB - Chinese national standards - Page 8478
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 6901.7-1986
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Silica refractories--Determination of titanium dioxide content--Diantipyrglmethane photometric method
WITHDRAWN published on 16.9.1986
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GB/T 6901.7-2004
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Chemical analysis of silica refractories—Part 7:Determination of titanium dioxide—Diantipyrylmethane photometric method
WITHDRAWN published on 19.1.2004
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GB/T 6901.8-1986
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Silica refractories--Determination of calcium oxide content and magnesium oxide--Atomic absorption spectrophotometric method
WITHDRAWN published on 16.9.1986
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GB/T 6901.8-2004
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Chemical analysis of silica refractories—Part 8:Determination of calcium oxide and magnesium oxide—Atomic absorption spectrophotometric method
WITHDRAWN published on 19.1.2004
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GB/T 6901.9-1986
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Silica refractories--Determination of potassium oxide and sodium oxide content--Atomic absorption spetrophotometric method
WITHDRAWN published on 16.9.1986
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GB/T 6901.9-2004
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Chemical analysis of silica refractories—Part 9:Determination of potassium oxide and sodium oxide-Atomic absorption spectrophotometric method
WITHDRAWN published on 19.1.2004
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GB/T 6902-1986
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Testing methods for railway signal relays
WITHDRAWN published on 1.1.1986
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GB/T 6902-2001
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Testing methods for railway signal relays
WITHDRAWN published on 20.12.2001
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GB/T 6902-2010
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Test methods for railway signal relays
WITHDRAWN published on 10.11.2010
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GB/T 6903-1986
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Methods for analysis of water for boiler and for cooling--General rule
WITHDRAWN published on 16.9.1986
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