The polycrystalline disk is fabricated with {TAIL ~ protruding portions} in {HEAD ~ the location} where the blades are to be bonded 
The polycrystalline disk is fabricated with { TAIL ~ protruding portions } in { HEAD ~ the location } where the blades are to be bonded
OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH