rotary polygonal piston engine

例句：

1. 1.The rotary polygonal pistonengine is a type of internal combustion engine that uses rotating pistons to convert mechanical energy into thermal energy.
   旋转多边形活塞发动机是一种内燃机类型，它使用旋转的活塞将机械能转化为热能。
2. 2. The rotarypolygonal piston engine has beenwidely used in various industries due to itshigh efficiency and low emissions.
   由于其高效率和低排放，旋转多边形活塞发动机在各种行业中得到了广泛应用。
3. 3. The rotarypolygonal piston engine is animportant component of the modern automobile industry,providing power and propulsion for vehicles.
   旋转多边形活塞发动机是现代汽车工业的重要部件，为车辆提供动力和推进力。