{HEAD ~ The thickness} of {TAIL ~ the thick walled portion} is set to be about 1.4 to 1.6 times the thickness of the thin walled portion 
of
{ HEAD ~ The thickness } of { TAIL ~ the thick walled portion } is set to be about 1.4 to 1.6 times the thickness of the thin walled portion
HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH