A brazing oven includes an arrangement employing a gas curtain or {HEAD ~ barrier} to cover the port or {TAIL ~ opening} of the oven whenever the door is opened 
to cover
A brazing oven includes an arrangement employing a gas curtain or { HEAD ~ barrier } to cover the port or { TAIL ~ opening } of the oven whenever the door is opened
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL REL OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH