{TAIL ~ The apparatus} of the present invention also includes means for driving the cutting tool assembly into and out of {HEAD ~ engagement} with the tube 
{ TAIL ~ The apparatus } of the present invention also includes means for driving the cutting tool assembly into and out of { HEAD ~ engagement } with the tube
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH