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