The lowered position is for long distance haulage of {HEAD ~ the trailer} in {TAIL ~ order} to achieve fuel economy 
in
The lowered position is for long distance haulage of { HEAD ~ the trailer } in { TAIL ~ order } to achieve fuel economy
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH