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Standards GB - Chinese national standards - Page 6342
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 19420-2003
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Terminology of salt-making industry
WITHDRAWN published on 25.11.2003
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GB/T 19421.1-2003
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Test methods of crystalline layered sodium disilicate—Qualitative analysis of delta-crystalline layered sodium disilicate-Method of X-ray diffractometer
WITHDRAWN published on 11.12.2003
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GB/T 19421.10-2003
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Test methods of crystalline layered sodium disilicate—Potassium fluosilicate volumetric methods for determination of silica dioxide content
WITHDRAWN published on 11.12.2003
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GB/T 19421.11-2003
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Test methods of crystalline layered sodium disilicate—Atomic absorption spectrophotometric methods for determination of calcium oxide content
WITHDRAWN published on 11.12.2003
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GB/T 19421.12-2003
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Test methods of crystalline layered sodium disilicate—Atomic absorption spectrophotometric methods for determination of magnesium oxide content
WITHDRAWN published on 11.12.2003
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GB/T 19421.2-2003
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Test methods of crystalline layered sodium disilicate—Measurement of whiteness
WITHDRAWN published on 11.12.2003
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GB/T 19421.3-2003
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Test methods of crystalline layered sodium disilicate—Method for determination of pH
WITHDRAWN published on 11.12.2003
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GB/T 19421.4-2003
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Test methods of crystalline layered sodium disilicate—EDTA volumetric methods for determination of calciumion exchange capacity
WITHDRAWN published on 11.12.2003
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GB/T 19421.5-2003
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Test methods of crystalline layered sodium disilicate—EDTA volumetric methods for determination of magnesium exchange capacity content
WITHDRAWN published on 11.12.2003
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GB/T 19421.6-2003
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Test methods of crystalline layered sodium disilicate—Gravimetric methods for determination of the loss on ignition
WITHDRAWN published on 11.12.2003
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