China Copper，lead and zinc GB Standards Search Result

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 27680-2011 Copper，lead ，zinc and nickel concentrates - Experimental methods for checking the bias of sampling 铜、铅、锌和镍精矿检查取样误差的实验方法 - 英文版
	GB/T 27674-2011 Copper，lead and zinc sulfide concentrates - Determination of hygroscopic moisture in the analysis sample - ?Gravimetric method 硫化铜、铅和锌精矿试样中湿存水分的测定重量法 - 英文版

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