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Standards GB - Chinese national standards - Page 7206
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 24581-2009
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Test method for low temperature FT-IR analysis of single crystal silicon for - impurities
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GB/T 24582-2009
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Test method for measuring surface metal contamination of polycrystalline silicon by acid extraction-inductively coupled plasma mass spectrometry
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GB/T 24583.1-2009
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Vanadium-Nitrogen alloy—Determination of vanadium content—The ammonium ferrous sulfate titration method
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GB/T 24583.2-2009
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Vanadium—Nitrogen alloy—Determination of nitrogen content—Thermal conductimetric method after fusion in a current of inert gas
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GB/T 24583.3-2009
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Vanadium-Nitrogen alloy-Determination of nitrogen content—The distillation-neutralization titration method
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GB/T 24583.4-2009
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Vanadium—Nitrogen alloy—Determination carbon of content—The infrared absorption method
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GB/T 24583.5-2009
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Vanadium-Nitrogen alloy—Determination of phosphorus content—The bismuth molybdenum blue spectrophotometry method
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GB/T 24583.6-2009
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Vanadium-Nitrogen alloy—Determination of sulfur content—The infrared absorption method
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GB/T 24583.7-2009
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Vanadium-Nitrogen alloy—Determination of oxygen content—The infrared absorption method
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GB/T 24583.8-2009
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Vanadium-Nitrogen alloy—Determination of silicon,manganese,phosphorus,aluminum content—Inductively coupled plasma atomic emission spectrometric method
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