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