Machines for Use in Steelmaking and in Blast-Furnace Production-Namely, Rolling Mills, Draw Benches, Tube Rollers, Tube Welders, Hot-Blast Valves and Cold-Blast Valves for Blast-Furnaces, Converters, Transit Mixers, Locks for Steel Spilling Ladles, Carts for Steel Spilling Ladles, Machines for Continuous Casting; Equipment for Chemical and Electrochemical Treatment of Rolled Steel or Metal-Namely, Machines for Continuous Etching of Tubes, Wire and Strips, Machines for Electrochemical Cleaning and Polishing of Rolled Metals, Machines for Coating of Rolled Metals with Other Metals and Polymerized Materials; Machine Assembly Lines for Rolled Stock and Tube Production Comprising Uncoilers, Straighteners, Shears, Welders, Loopers, Induction Furnaces, Reducers, Sorters, Cutters and Controls Therefor Sold as a Unit; General Purpose Machines for Use in Metal Processing-Namely, Spindles for Jointing of Shafts, Couplings, Gear Transmissions and Reducers for Drives for Metallurgical Equipment, Lubricaters for Metallurgical Machines, Forging and Pressing Equipment; Finishing Machines for Rolling Mills and Tube Mills-Namely, Cold Saws and Hot Saws, Scissors for Separating of Cold and Hot Rolled Metals, Sorters for Sheets and Tubes, Machines for Thermomechanical Treatment of Rolled Metals, Joint Welding Machines, Sheet Stacking Machines, Presses for Punching, Gasostats and Hydrostats, Extrusions Presses