{TAIL ~ first mounting means} disposed on said trap for mounting said trap on a vertical wall of {HEAD ~ said furnace}; and 
{ TAIL ~ first mounting means } disposed on said trap for mounting said trap on a vertical wall of { HEAD ~ said furnace } ; and
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH