Wiper wear is substantially reduced in most instances by {HEAD ~ the wipers} contact with {TAIL ~ the relatively smooth islands}, rather than with the relatively abrasive base layer 
contact with
Wiper wear is substantially reduced in most instances by { HEAD ~ the wipers } contact with { TAIL ~ the relatively smooth islands } , rather than with the relatively abrasive base layer
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH