Mechanics research on chief draining pump cavitation damage in coal mine;

在煤矿井下的排水系统中，需要多台排水泵协调地工作。

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This paper also carefully introduces a way and path to keep economic operation for chief draining pump in coal mine underground.

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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The single-phase vertical draining pump has reasonable structure, stable performances, convenient use and wide scope of application, and the use length can be set according to demands.

本实用新型结构合 理，性能稳定，使用方便，适用范围广，使用长度可根据需要任定。

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