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