{HEAD ~ The housing}, generally designated 20, is formed in {TAIL ~ telescopically interfitted and welded upper and lower cupped sheet metal sections} 21, 22 respectively, which will be recognized as formed, interfitted and secured together at a medial flanged and welded area 28 in a manner which is essentially conventional in the trade 
is formed in
{ HEAD ~ The housing } , generally designated 20 , is formed in { TAIL ~ telescopically interfitted and welded upper and lower cupped sheet metal sections } 21 , 22 respectively , which will be recognized as formed , interfitted and secured together at a medial flanged and welded area 28 in a manner which is essentially conventional in the trade
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL 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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH