Centrifugal pump characteristic curve on the efficiency of the highest point known as the design point, a pump at the point corresponding to pressure head and flow of work under the most economic.
离心泵特性曲线上的效率最高点称为设计点，泵在该点对应的压头和流量下工作最为经济。
This paper explained the principle of constant-pressure water supply on the basis of characteristic curve of pipeline resistance and water pump head.
本文首先根据供水系统的管阻特性曲线和水泵扬程特性曲线，分析了恒压供水的原理；
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