inflator

例句：

1. 1.The car's engine is an inflator.
   这辆车的引擎是一个膨胀机。
2. 2.The inflator is used to inflate tires.
   膨胀机用来给轮胎充气。
3. 3.The inflator was designed to make the process more efficient.
   膨胀机的设计目的是为了使过程更加高效。