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用确定的工艺从原矿中提取金属的成本近年来明显地增长,从现在起,新矿山工程的设计师们应放宽处理方法的范围,应当选择经济效果最佳、投资回收最快的新工艺。
The cost of extracting metals from raw ore with defined processes has increased significantly in recent years. From now on, designers of new mine projects should relax the range of treatment options and should choose new processes with the best economic results and the fastest return on investment.