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