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Standards GB - Chinese national standards - Page 5517
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 11197-1989
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Standard for marine radio communication vocabulary
WITHDRAWN published on 8.5.1989
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GB/T 11198.1-1989
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Sulphuric acid for industrial use--Determination of sulphuric acid content and calculation of free sulphur trioxide content of oleum--Titrimetric method
WITHDRAWN published on 11.3.1989
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GB/T 11198.10-1989
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Sulphuric acid for industrial use--Determination of mercury content--Flameless atomic absorption spectremetric method
WITHDRAWN published on 11.3.1989
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GB/T 11198.11-1989
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Sulphuric acid for industrial--Determination of oxides of nitrogen--24-Xylenol spectrophotometric method
WITHDRAWN published on 11.3.1989
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GB/T 11198.12-1989
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Sulphuric acid for industrial use--Determination of sulphur dioxide content--Iodometric method
WITHDRAWN published on 11.3.1989
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GB/T 11198.13-1989
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Sulphuric acid for industrial use--Determination of chlorine content--Potentiometric method
WITHDRAWN published on 11.3.1989
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GB/T 11198.14-1989
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Sulphuric acid for industrial use--Determination of transparency
WITHDRAWN published on 11.3.1989
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GB/T 11198.15-1989
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Sulphuric acid for industrial use--Determination of colourity
WITHDRAWN published on 11.3.1989
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GB/T 11198.2-1989
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Sulphuric acid for industrial use--Determination of ash--Gravimetric method
WITHDRAWN published on 11.3.1989
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GB/T 11198.3-1989
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Sulphuric acid for industrial use--Determination of iron content--O-Phenanthroline spectrophotometric method
WITHDRAWN published on 11.3.1989
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