machines and installations comprised thereof for processing liquids, solids and gases for general industrial use, namely, [ centrifuges, ] clarifiers, classifiers, cyclones, decanters, dewatering machines, diffusers, [ extraction towers, ] rotary vacuum drum filtering machines, disc filtering machines, pressure belt drum filtering machines, horizontal belt filtering machines, rigid belt filtering machines and pressure filtering machines, flocculators, flotation machines, hydrocyclones, liquid separating machines, mixers, centrifugal pumps and diaphragm pumps, all pumps being for general industrial use including mixing, reacting, homogenizing, dispersing, disintegrating and macerating, repulpers, screening machines, sieve bends, settlers, slakers, mechanized mixing tanks, thickeners, and wash machines

[ water, wastewater and sewage treatment systems and installations comprising aerators, biological treatment apparatus, clarifiers, digesters, distributors, filters, fluid bed furnaces for combusting, drying and incinerating, pumps, screens, settlers, sludge mixers and tanks, all sold as components of the aforesaid systems and installations; fluid bed furnaces for calcining, roasting, drying, cooling, and incinerating for general industrial use ]