Vortex pump with open impeller

开式旋涡泵；

Vortex pump efficiency of less than 40%.

旋涡泵的效率一般不超过40%。

Some characteristics of performance characters of centrifugal slurry pump and vortex pump were also discovered at the same time.

并揭示了离心式渣浆泵和旋流泵性能上的一些特点。

The theoretical analysis and experimental study of a small-flow high-head vortex pump are carried out.

对一种小流量旋涡泵的汽蚀性能进行了理论分析及试验研究。

The theoretical analysis and experimental study of a small - flow high - head vortex pump are carried out.

对一种小流量旋涡泵的汽蚀性能进行了理论分析及试验研究.