扬程曲线 meaning in Chinese

throttling curve

A new type of very low specific speed pump ? roto - jet pump is presented for low flowrate and high head transportation , which is introduced at the end of the thesis
论文最后主要研究了一种隶属于极低比转数离心泵范畴的新型泵? ?旋喷泵，它是一种新型的石油化工用泵，具有流量小、扬程高、流量扬程曲线平缓的特点。
In present thesis , the actual design theories and methods for super - low specific - speed pump are introduced first , including " the increased flowrate design method " , " the method of anti - hump on h ~ q characteristic curve " , " non - overload design method " , " the design method of complex impeller " and so on . according to these methods , 5 types of impeller have been designed
论文首先对极低比转数离心泵的现行设计理论和设计方法作了介绍，包括加大流量设计法、减小或消除扬程曲线驼峰的途径、无过载设计及复合叶轮设计法等，并按照这些方法设计了五种叶轮。