论文部分内容阅读
The prices of copper scraps are going up as thesupply of raw materials runs short.From Janu-ary to May,the averaged cumulative unit priceof imported copper scraps rose about 17.4 per-
The prices of copper scraps are going up as the supply of raw materials runs short. From Janu-ary to May, the averaged cumulative unit price of imported copper scraps rose about 17.4 per-