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