牵引机英语怎么说

牵引机:
1. hauling machine
2. prime move
3. tractor

Relative explainations:
<dragger> <propelling machine> <hauling engine> <prime mover> <traction engine> <draw machine>

联接杆拖拉机后部牵引机械的横梁
A bar across the rear of a tractor for hitching machinery.

Tractor