The apparatus includes a tube holding mechanism, a rotating cutting tool and {TAIL ~ a device} for driving {HEAD ~ the cutting tool} 
The apparatus includes a tube holding mechanism , a rotating cutting tool and { TAIL ~ a device } for driving { HEAD ~ the cutting tool }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD