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