propelling chain

例句：

1. 1. The propelling chain isresponsible for the vehicle's acceleration.
   推进链负责车辆的加速。
2. 2. The engineerdesigned a propellingchain that could withstand highloads.
   工程师设计了一种能承受高负载的推进链。
3. 3. The propelling chainwas used to power the spacecraft duringits launch.
   推进链在航天器发射时用于提供动力。