An electron beam welder is then applied to weld {HEAD ~ the various portions} of housing 12, namely {TAIL ~ upper housing member} 44, intermediate housing member 46 and lower housing member 48 together 
namely
An electron beam welder is then applied to weld { HEAD ~ the various portions } of housing 12 , namely { TAIL ~ upper housing member } 44 , intermediate housing member 46 and lower housing member 48 together
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH