reciprocating piston engine

• 活塞式发动机

reciprocating piston engine的用法和样例：

例句

1. It is also generally conceded that Wankel engines are quieter than comparable piston engines.
   转子发动机比通常的活塞式发动机噪音小也是大家所公认的。
2. In a radial engine all the cylinders are set in a circle and all point toward the center of the circle.
   在径向式发动机里，所有的气缸都布置在一个圆圈里，而且都指向圆心。