{HEAD ~ a tapered wall} extending from the bottom end to {TAIL ~ the top end}, said tapered wall having an outer surface and an inner surface 
extending to
{ HEAD ~ a tapered wall } extending from the bottom end to { TAIL ~ the top end } , said tapered wall having an outer surface and an inner surface
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH