propulsion unit的用法和样例：
例句
- Marine propulsion shafting is one of the main parts of marine propulsion plant.
船舶推进轴系是船舶推进装置的重要组成之一。 - The paddle wheel was the first form of mechanical propulsion for a boat, but has now been almost entirely superseded by more modern forms of marine propulsion.
桨轮是轮船机械推进的第一种形式，而现在则完全被现代船舶推进装置所取代。
propulsion unit的相关资料：
临近单词
propulsion
propulsion data display panel
Propulsion and Power Division
propulsion aerothermodynamics
Propulsion Subsystem Structure
Propulsion Engineering Officer
Propulsion Research Laboratory
Propulsion Wind Tunnel Facility
Propulsion and Power Generation
propulsion airframe integration
Propulsion System Rocket Engine
