As a result of one or more of these aspects of the invention, {HEAD ~ cleaning} of {TAIL ~ the pad} is superior to that in the prior art 
As a result of one or more of these aspects of the invention , { HEAD ~ cleaning } of { TAIL ~ the pad } is superior to that in the prior art
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH