7 ELECTRIC PUMPS, REACTORS, MIXERS, DECANTERS AND FILTERS FOR PHYSICAL, CHEMICAL OR BIOLOGICAL TREATMENT OF WATER; GRAVITY SEPARATORS, CENTRIFUGAL SEPARATORS, SAND AND MEMBRANE FILTERS, CENTRIFUGES, GRIDS FOR WATER AND SLUDGE TREATMENT; STATIC AND DYNAMIC MIXERS, HYDRO-EJECTORS, CENTRIFUGAL AND VOLUMETRIC PUMPS, STIRRERS, AGITATORS; ALL FOR USE IN A MUNICIPAL OR INDUSTRIAL WATER TREATMENT FACILITY