The flatbed unit includes {HEAD ~ forward and rear slabs} coupled together for {TAIL ~ folding movement}, and the forward slab is foldably mounted on the tractor 
coupled together for
The flatbed unit includes { HEAD ~ forward and rear slabs } coupled together for { TAIL ~ folding movement } , and the forward slab is foldably mounted on the tractor
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH