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