holding the disk blade assembly together under {TAIL ~ conditions} of heat and {HEAD ~ pressure} until bonding occurs, and 
holding the disk blade assembly together under { TAIL ~ conditions } of heat and { HEAD ~ pressure } until bonding occurs , and
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH