propulsion device

• 推进器

propulsion device的用法和样例：

例句

1. Rocket motors have many advantages over other forms of propulsion.
   火箭发动机比其他推进器有许多优点。
2. The Center of Pressure, due to the propulsion of air, is approximately at the bottom of the ducts.
   该中心的压力，由于推进器的空气，大约是底部的管道。