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