A principal advantage of the invention resides in {HEAD ~ its ability} to deal with {TAIL ~ the film} of dirt typically remaining after spraying of an automobile during a washing operation 
A principal advantage of the invention resides in { HEAD ~ its ability } to deal with { TAIL ~ the film } of dirt typically remaining after spraying of an automobile during a washing operation
OTH OTH OTH OTH OTH OTH OTH OTH 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 OTH OTH