A way to keep economic operation for chief draining pump in coal mine underground
煤矿井下主排水泵保持经济运行的途径
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Developing wet room type of draining pump station design software utilizing VB and AutoCAD
用vb和AutoCAD开发湿室型排水泵站设计软件
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详细地阐述了保持煤矿井下大泵经济运行的途径和方法。
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