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