{TAIL ~ An upper housing portion} has {HEAD ~ an integral pressure blade} for exerting a constant downward force on the advancing protective covering 
{ TAIL ~ An upper housing portion } has { HEAD ~ an integral pressure blade } for exerting a constant downward force on the advancing protective covering
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH