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