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