Constructions of metal, namely, scraper bridges, sucker cranes, harrow thickeners, rakes, degassers, degreasers, grit chambers, classifiers, conveyors, compactors, rotary screens, Archimedian screws, mixing machines, floating decanters and vats of metal.;
Filtering machines intended for wastewater treatment; machines for the disposal of liquid waste; hydraulic turbines; floating fast turbines; turbines for stirring and oxygenating water; pump impellers; suction turbines other than for land vehicles; aerators [machines]; aerators for liquids [machines]; presses; filter presses; spiral pressing devices; pumps, compressors and blowers; vertical turbine pumps; suction pumps; wastewater pumps; sludge pumps; agitators; agitators for circulating fluids.;
Water purification installations; waste water treatment installation; apparatus for purifying waste water, namely, fine and medium bubble air diffusers; decanters for water; decanting apparatus for sewage; sewage disposal plants; water mixing apparatus; waste water treatment machines; water treatment machines; waste water lifting stations; waste water lifting mini-stations.;