{HEAD ~ The elongated track} is mounted on the tractor and extends in {TAIL ~ generally parallel upwardly spaced relation} to the water main 
extends in
{ HEAD ~ The elongated track } is mounted on the tractor and extends in { TAIL ~ generally parallel upwardly spaced relation } to the water main
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH