Machinery for treating metals, including electric wire coil-winders, e.g. : (1) Crucible vice-presses for alumino-thermic welding of rails, machine parts, etc.(2) Machinery for scouring or pickling metals (by acid, trichloroethylene, etc.) including pickling units for sheet-rolling mills, but excluding steam or sand blasting appliances of beading 84.24.(3) Rotating drums for de-sanding, de-scaling or polishing metal goods (e.g., nuts, bolts or ball bearings) .(4) Machines for tin-plating by dipping.(5) Pig iron breakers and special stamping mills for breaking up cast iron scrap.(6) Special machines for winding or covering electric cables with layers of textile yarn, impregnated paper strips, asbestos tapes or other insulating or protective material; but excluding gimping machines of the kind falling in heading 84.47.(7) Electric wire coil-winders (e.g., for motors, transformers or inductors).