水泵工 meaning in Chinese

plugman
pumattendant
water pump-man

Talking about the flow and lift of parallel - series pump working points with computing method
浅谈计算法求解并联水泵工况点流量及扬程
To tune up the frequency of power supply by the transducer in the system , this adjusting make the speed of electromotor and performance curve of pump change . at last , it make the status of a pump alter
在变频调速恒压供水系统中，单台水泵工况的调节是通过变频器来改变电源的频率f来改变电机的转速n ，从而改变水泵性能曲线得以实现的。
Through analyzing the figure of energy wasting of pump , the quality in pipes is direct proportion of the speed of pump if the speed of pump is reduced . the power of electromotor fell the cube of the speed of pump . so the energy wasting of constant pressure water supply based on variable frequency speed regulating technology is envident less than the traditional mode is used throttle to supply water
分析水泵工况的能耗比较图，可以看出利用变频调速实现恒压供水，当转速降低时，流量与转速成正比，功率以转速的三次方下降，与传统供水方式中用阀门节流方式相比，在一定程度上可以减少能量损耗，能够明显节能。