This essay introduces the up-to-date progress of copper hydrometallurgy in the world and the development prospect in China.

本文介绍了世界上湿法炼铜技术最新的进展以及在中国的发展前景。

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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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