This essay analyzes the environmental impact caused by copper iron ore digging project below Wells.

前言：对铜铁矿井下采掘工程产生的环境影响进行了分析。

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Oxidized copper ore from the Tonglushan copper iron Mine, low in copper grade and abundant in mud and alkali gangue, is difficult to concentrate.

铜绿山铜铁矿氧化铜矿石品位低，泥和碱性脉石含量高，属难选氧化铜矿。

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The special slot is adopted in the rotor of the induction machine with compound cage rotor and there is two materials of casting aluminum and copper iron alloy in the slot.

复合笼条转子感应电动机转子采用特殊的槽形，且槽中含有铸铝和铜铁合金两种材料。

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The iron and copper helmet was probably used for ceremonies.

VOA: special.2010.08.04

The company's output of iron ore, as well as copper, zinc and nickel, surged in the last three months of 2009 because of strong demand from Chinese carmakers and construction companies.

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