7 [ Machines and devices for producing air conditioning and ventilation hardware and components, namely, metal and sheet metal forming and finishing machines; metal working machines and machine tools for pressing, punching, cutting, edge-forming and separation of sheet metal and metal; metal working machines for the shaping, forming, thread-boring, thread-cutting of flanges and associated machine tools, namely, flange forming machines, duct cutting machines, sawing machines, duct manufacturing machines; gas driven and electrical welding machines and equipment, namely, duct manufacturing machines, duct welding machines, fitting welding machines; channeling, punching and press tools, namely, routers, boring machines, power-operated punches, and drill presses for producing bends, couplings, reducers, collar saddles, T-pieces, cross pieces, Y-pieces, deviations transition pieces, telescopic ducts, end-covers and end-caps, S-Bends, silencers, cleaning covers, slide-in couplings, reducers, diffusers, supply air outlets, registers, grilles, and flexible connectors; hydraulic valve actuators; and pneumatic valve actuators; machines, namely, dedusters for waste separation and removal, air-cooled condensers and their casings, air condensers ]