progressive cavity pump是什么意思

progressive cavity pump 英[prəˈɡresiv ˈkæviti pʌmp] 美[prəˈɡrɛsɪv ˈkævɪti pʌmp] [释义] 螺杆抽油泵; [网络] 螺杆泵; [例句]The rules of the single progressive cavity pump pressure modeling and transfering were studied based on the theory analysis. 通过理论分析，得出了单螺杆泵压力的产生和传递规律。