Mechanics research on chief drainingpump 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。
2
This paper also carefully introduces a way and path to keep economic operation for chief drainingpump 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。
3
The single-phase vertical drainingpump has reasonable structure, stable performances, convenient use and wide scope of application, and the use length can be set according to demands.