The method comprises {HEAD ~ the steps} of shaping the distal tip of the tube by providing {TAIL ~ a shaping means} for shaping the closed, rounded end of the tube 
The method comprises { HEAD ~ the steps } of shaping the distal tip of the tube by providing { TAIL ~ a shaping means } for shaping the closed , rounded end of the tube
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH