... hydro-mechanical mining method 水力机械采矿法 mining and mechanical engineering 矿业与机械工程 Mining Or Mechanical 采矿或机械 ...
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mining or mechanical
采矿或机械
以上为机器翻译结果，长、整句建议使用 人工翻译 。
It is difficult to establish a simple model which the mathematic or mechanical method can be used in the selection lf mining method, due to many influence and constraint factors.
由于采矿方法选择受诸多因素影响和制约，难于建立一个用数学或力学模型的方法加以处理。
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