英语翻译

英语翻译
In the pump industry,much our work involves two extremely simple,yet efficient machines ‐ ‐ the centrifugal pump and the AC induction motor.The centrifugal pump converts mechanical energy into hydraulic (flow,velocity,and pressure) energy and the AC motor converts electrical energy into mechanical energy.Many medium and larger centrifugals offer efficiencies of 75 – 90% and even the smaller ones usually fall into the 50 – 70% range.Large AC motors,on the other hand,can approach an efficiency of 97% and any motor,five hp and above,can be designed to break the 90% barrier.