This is accomplished by progressively reducing {HEAD ~ the oscillatory pivotal movement} of {TAIL ~ the carrier} 22 as the tool 17 is continuously advanced into the workpiece 
of
This is accomplished by progressively reducing { HEAD ~ the oscillatory pivotal movement } of { TAIL ~ the carrier } 22 as the tool 17 is continuously advanced into the workpiece
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH