74526093
May 18, 1994
Feb 27, 1996
industrial furnaces; industrial furnaces for the heat treatment of metallic workpieces; industrial rotary hearth furnaces; industrial gravity discharge furnaces; industrial furnaces for the carbonizing of metallic workpieces; parts of the aforementioned goods; parts of industrial furnaces, namely inlet locks, outlet locks, protective gas transfer tunnels, single processing chambers, batch conveyors, gas generators, and heating units
Environmental Control Apparatus