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and Chinese version GB Standards, you can purchase directly in the web page; After receive your payment, we will send the GB Standards PDF file to your Email within 1~3 days.
2. Other English version GB Standards are not ready translated, only after get your order, then we translate them, time usually need 3-5 days .


	GB/T 20104-2006 Method for identifying tendency of coal to spontaneous combustion by oxygen absorption with chromatograph 煤自燃倾向性色谱吸氧鉴定法 - 中英文版

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