{HEAD ~ The greatest expanding deflection} of {TAIL ~ the tube} 7 is obtained at the thin pressing portion 7a 
of
{ HEAD ~ The greatest expanding deflection } of { TAIL ~ the tube } 7 is obtained at the thin pressing portion 7a
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH