逆活塞

例句：

1. 1. The engine's performance is significantly improved by using a counter-piston design.
   使用反向活塞设计后，发动机的性能得到了显著提升。
2. 2. The engineers designed the new car with a reverse piston to improve fuel efficiency.
   工程师们设计了这款新车，采用了反向活塞以提高燃油效率。
3. 3. In the manufacturing process, the counter-piston plays a crucial role in reducing friction and enhancing precision.
   在制造过程中，反向活塞起到了关键作用，降低了摩擦并提高了精度。