Metal pipes and conduits for conveying gas, liquid, mist and solid particles; metal [ quadrilateral, ] round and [ oval pipes and ] conduits, namely, air conveying pipes and conduits, insulated [ and double-skin ducts; ] metal ancillary equipment for connection, hanging and installing or securing of the pipes and conduits, namely, metal elbows, [ straps, mounting clamps, hollow forms, cradles, clamps, and sockets; ] metal connectors for pipes and conduits, namely, flanges conforming to pipes and conduits; metal pipes, [ pipelines, ] and metal pipe fittings with integrated pipe flanges; metal connectors for assembling pipes and conduits; metal pipe fittings for [ quadrilateral, ] round [ or oval ] metal pipes and conduits; inspection lids, namely, metal access doors; [ metal discharge pipes; ] metal connecting and tensioning rings and clamps for connecting pipe shaped metal construction materials; and metal air ventilating ducts

[ 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 ]

[ Manual tools, namely, mastic tools, namely, spreaders for mixing and spreading mastic, notching tools, namely, punches for creating depressions and holes in metal sheets and nut runners and pliers for working with metal and sheet metal, and for finishing and assembling metal and sheet metal ]

[ Air conditioning and ventilation equipment, namely, habitat space filtered air supply units and removal devices in the nature of air purifying units, air purifiers, air filters for residential, industrial, commercial and climate controlled habitat installations; devices for industrial research, namely, air filters for industrial installations; ventilators and housing for air conditioning and ventilation installations; air ventilation pumps for industrial and domestic installations; air cleaning filters for domestic and industrial installations; dust removal devices, namely, air filters for domestic and industrial uses; air filtration units; air filtration and cleaning equipment and machines, namely, air-washers, air-washer casings, air filters for industrial use and air filter casings thereto, cooling coils, humidifiers, dehumidifiers; heat pumps; heat exchangers; and heat storage tanks ]

[ Rental of tools and devices for metal working; installation, cleaning, maintenance, and repair of processing machines, tools and devices in the nature of metal working ]