The pressure blade ensure {TAIL ~ adequate contact} between the advancing cover material and {HEAD ~ the outer surface} of the counter shaft 
The pressure blade ensure { TAIL ~ adequate contact } between the advancing cover material and { HEAD ~ the outer surface } of the counter shaft
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH