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；
The municipal water supply networks, is very difficult to determine the line of a curve.
而在市政供水管网中，则很难得到一条确定的管路特性曲线。
The municipal water supply networks, is very difficult to determine the line of a curve.
而在市政供水管网中，则很难得到一条确定的管路特性曲线。
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