We dowse oil and ore in South America for big companies.我们在南美洲为一些大公司探测石油和矿石。How many tons of ore can this machine crush in an hour?这机器每小时可以破碎多少吨矿石?The net profit amounts to 20 dollars per ton of ore.每吨矿砂的净利达20美元....
The method is presented for preparation metasilicate pentahydrate from residue after extracting magnesium from serpentine ore.以蛇纹石提镁残渣为原料,采用常压蒸馏法直接合成了六配位有机硅化物.Gold ore main type is auriferous quartz vein type.金矿床主要为含金硫化物...