steam piston

例句：

1. 1.The steam engine is used to power factories and machines.
   蒸汽引擎用于驱动工厂和机器。
2. 2. The steam-powered piston is a crucial component of the machine.
   蒸汽动力活塞是这台机器的关键部件。
3. 3.The steam piston is responsible for moving the piston rod.
   蒸汽活塞负责推动活塞杆移动。