The Prediction if pumpage from mining wells is very important for mining work.

矿井涌水量预测矿山开采具有重要意。

For medium and larger horsepower sizes, some manufacturers elect to offer by-pass (pumpage cooled) jacketed motor designs.

大中型率（马力），一些制造商选择提供旁路（泵冷却）加套设计结构。