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Wires and bars of metal for coating or welding purposes; metals in powder, grain or pellet forms for use in the coating industry, in particular metals having wear-resistant and corrosion-resistant functions, including heat-resistant function for use in manufacture of metallic structural components; metals in powder and dust form for use in manufacture of objects, workpieces and components using the 3D additive manufacturing processes.Spray apparatus for metallic, ceramic, plastic, small part materials with the introduction of thermal energy, whereby heat can be introduced by means of arcs or flames; apparatus for coating components by means of accelerated particles without heat introduction; spray paint machines, spray devices and spray systems of both kinds; parts and fittings for the aforesaid goods, including particle or wire conveyors and feeders, particle injectors and compressed gas generators; gas-operated coating machines with gas withdrawal and gas supply function for preparing a stored gas amount.Burners with suitability for particle heating and acceleration when running through the burner (flame spray burners); apparatus for workpiece cooling when processing by means of aligned cooling agents or cold gas rays.Coating of metallic structural components with resistant layers of all kinds, in particular by means of powder particles applied with high speed or curing of slurry-like coatings; surface finishing of metallic structural components by means of abrasive or thermal processes, curing, flame hardening and annealing processes.