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Standards GB - Chinese national standards - Page 477
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 15057.10-1994
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Limestone for chemical industry--Determination of content of loss on ignition--Gravimetric method
Standard published on 5.5.1994
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GB/T 15057.11-1994
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Limestone for chemical industry--Determination of size
Standard published on 5.5.1994
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GB/T 15057.2-1994
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Limestone for chemical industry--Determination of calcium and magnesium oxides content
Standard published on 5.5.1994
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GB/T 15057.3-1994
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Limestone for chemical industry--Determination of insoluble matter content of hydrochloric acid--Gravimetric method
Standard published on 5.5.1994
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GB/T 15057.4-1994
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Limestone for chemical industry--Determination of iron and aluminium oxides content--Gravimetric method
Standard published on 5.5.1994
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GB/T 15057.5-1994
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Limestone for chemical industry--Determination of silicon dioxide content--Molybdenum blue spectrophotometric method
Standard published on 5.5.1994
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GB/T 15057.6-1994
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Limestone for chemical industry--Determination of iron content--Phenanthroline spectrophotometric method
Standard published on 5.5.1994
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GB/T 15057.7-1994
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Limestone for chemical industry--Determination of aluminium oxide content--Chromazurol S spectrophotometric method
Standard published on 5.5.1994
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GB/T 15057.8-1994
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Limestonefor chemical industry--Determination of sulfur content--Gravimetric and combustion-iodate titrimetric methods
Standard published on 5.5.1994
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GB/T 15057.9-1994
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Limestone for chemical industry--Determination of phosphorus content--Molybdenum blue spectrophotometric method
Standard published on 5.5.1994
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