{HEAD ~ The head pipe} has {TAIL ~ a supporting surface portion} corresponding to the surface of the aforementioned warped intermediate portion 
has
{ HEAD ~ The head pipe } has { TAIL ~ a supporting surface portion } corresponding to the surface of the aforementioned warped intermediate portion
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH