internal gearbox造句

The motors transmitted their power through internal gearboxes, cardan shafts and quill final drives.
The moving walkway she was travelling along at the station collapsed and she was crushed in the internal gearbox.
Jet aircraft have four types of PTO units : internal gearbox, external gearbox, radial driveshaft, and bleed air, which are used to power engine accessories.
It's difficult to find internal gearbox in a sentence. 用internal gearbox造句挺难的