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