|
US847962A
|
|
Furnace.
|
|
US704353A
|
|
Steam-boiler furnace.
|
|
US674936A
|
|
Furnace for the reduction of zinc ores.
|
|
US652193A
|
|
Furnace for roasting ores.
|
|
CA65626A
|
|
Smelting furnace
|
|
CA69470A
|
|
Ore roasting furnace
|
|
CA66486A
|
|
Apparatus for utilizing the waste gases in the production of aluminum
|
|
CA66909A
|
|
Cylindreical muffler furnace
|
|
CA66485A
|
|
Apparatus for utilizing the waste gases and fumes from furnaces
|
|
US641460A
|
|
Furnace for roasting and reducing ores.
|
|
US641461A
|
|
Apparatus for utilizing waste gases and fumes from furnaces.
|
|
CA22936A
|
|
Apparatus for disintegrating ores
|
