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