technological and economical problem
technological and economical problem
技术经济问题
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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This paper analyses the problem of the technological flowsheet for concentractor, Er-fengshan Iron Mine, and obtain obvious economical profit by improving technology to increase metal recovery.
分析了二峰山铁矿选矿厂工艺流程存在的问题，并通过技术改造提高金属回收率，取得了显著的经济效益。
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