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