例句與造句

1. analyzing the performance curves of pumps and network in a variable flow pumping system, concluding the influence factors of energy saving and the optimal ranges of variable frequency drive ( vfd )
   摘要通過(guò)分析變頻水泵及管網(wǎng)系統(tǒng)在變工況下的特性曲線，得出影響水泵變頻節(jié)能效果的主要因素和變頻調(diào)速的適用范圍。
2. 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
   在變頻調(diào)速恒壓供水系統(tǒng)中，單臺(tái)水泵工況的調(diào)節(jié)是通過(guò)變頻器來(lái)改變電源的頻率f來(lái)改變電機(jī)的轉(zhuǎn)速n，從而改變水泵性能曲線得以實(shí)現(xiàn)的。
3. It's difficult to find performance curves of pump in a sentence. 用performance curves of pump造句挺難的