performance curves

• 性能曲线

performance curves的用法和样例：

例句

1. The general situation of domestic oil line pumps is presented,the hydraulic design formulas and performance curves of the multistage impeller pumps are given.
   介绍了国内输油管线泵的概况，并提供了多级中开式输油泵的水力设计公式和性能曲线。