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