These processes have generally employed bonding aids, such as brazing materials but {HEAD ~ use} of such materials does not produce {TAIL ~ the high strength joints} which are necessary in gas turbine engines 
not produce
These processes have generally employed bonding aids , such as brazing materials but { HEAD ~ use } of such materials does not produce { TAIL ~ the high strength joints } which are necessary in gas turbine engines
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH