7 Waste pumps; aeration rotors being machines; aeration gyros being machines; basin covers, gullies, weirs, grates, grilles, inlets, circulation agitators and rotary sprayers being machine parts for machines for the purpose of storage, treatment, conveyance and discharge of liquids, waste of all kinds, screenings, sewage sludge and filter cakes; nozzle sprayers as parts of machines, in particular power-operated sprayers; fixed, travelling or rotating basin bridges and circulation bridges being parts of machines; filtering machines for chemical processing; machine tools, namely clamp connectors for piping as parts of machines; drag conveyors being machines; raking machines; piston pumps; machines and machine tools for treatment of materials and for manufacturing; machines for pumping, treatment and storing of sewage sludge; machines for separating solid materials and fluids; machines and mechanical devices for industrial filtration; diaphragm pumps being machines and parts of machines; surface aerators being machines and parts of machines; pumps being machines; pumps being parts of machines; raking screens being machines and parts of machines; printing presses for screening machines; shredding machines for screenings; rake cleaners being machines; tubes being fitted parts of machines; non-return flap valves being machines and parts of machines; stirrers being machines; grit chambers being machines and parts of machines; sand fenders being machines and parts of machines; grit classifiers being machines and parts of machines; grit washers being machines and parts of machines; sliding valves being machines and parts of machines; sieves being machines and parts of machines; sifting machines; floating matter collectors being machines and parts of machines; sludge collectors being machines and parts of machines; waste compactors in the nature of sludge compactor machines and as parts of machines; sludge conveyors being machines and parts of machines; sludge pumps; underwater aerators being machines and parts of machines; circulating screws being machines and parts of machines; water separators; machines and apparatus for treatment, cleaning and filtering of liquids, except for machines and apparatus for treatment, cleaning and filtering of water, namely air and water backwashing machines for water intake screens, die-cutting machines and drop-forging machines for the manufacture of devices for storing, treating, transporting and draining-off of liquids, waste of all kind, screenings, sludge and filter cake, power operated screening rakes, step rakes, filter units, sieves, thickeners, dewatering devices, spiral pressing devices, rotary screens and screening washers, power operated sand classifiers and sand separators, spiral conveyors for dry, moist, wet, pasty, adhesive, dusty, bulky or abrasive material, dry or wet positioned pumps for waste water and sludge, in particular vortex vacuum pumps, bilge pumps, cutter head pumps and turbotex pumps; industrial screens, well screens, screen panels and filtering wells for industrial, agricultural, municipal, environmental, mining, surface water filtration, and oil and gas purposes being machines and parts of machines