矿山工程的投资重点［英］Ｇ．鲍威尔斯，Ａ．托马斯本文对今后五年内新建工程项目和现有生产矿山进行扩建的计划投资进行了分析。所涉及的金属为铜、镍、锌和贵重金属等。然而，必须指出，由于新投资所形成的生产能力，很多将取代这个时期内将要关闭或者将要减产的那一部... Mining Engineering Investment Focus [English] G. Powell, A. Thomas This article analyzes planned investments in the expansion of new construction projects and existing production mines in the next five years. The metals involved are copper, nickel, zinc and precious metals. However, it must be pointed out that due to the productive capacity created by the new investment, many will replace the one to be closed or to be cut down during this period ...