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