{TAIL ~ The blade} 1, wherein the blade is of rectangular overall shape and the first increase in thickness extends along {HEAD ~ the length} of the blade 
{ TAIL ~ The blade } 1 , wherein the blade is of rectangular overall shape and the first increase in thickness extends along { HEAD ~ the length } of the blade
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH