free piston plant

例句：

1. 1. The free piston plant is a type of internal combustion engine that uses a piston with no moving parts.
   自由活塞装置是一种内燃机，它使用一个没有移动部件的活塞。
2. 2.In the free piston plant, the piston moves up and down to convert mechanical energy into thermal energy.
   在自由活塞装置中，活塞上下运动将机械能转换为热能。
3. 3. The free piston plant is often used in aircraft engines due to its high efficiency and low noise levels.
   由于其高效率和低噪音水平，自由活塞装置常用于飞机发动机。