Machines for washing; filtering machines and filter installations consisting thereof for the filtration of fluids, in particular of waste water and process fluids; industrial machines for washing; filtering machines and filter installations consisting thereof for the filtration of fluids, in particular of waste water and process fluids; industrial filtering machines, in particular for the chemical industry, pharmaceutical industry, biotechnology companies, food industry, beverage industry, woodworking, plastic processing, agriculture, metal treating, textile industry, electronics industry, sugar industry and abattoirs; filters being parts for machines or motors or engines for the filtration of fluids; filters being parts of filtering machines and filter installations comprised thereof, included in class 7; screening installations for water purification; separators for separating solids from liquids; submersible pumps; parts for the aforesaid machines and installations.

Waste water treatment plants; water recycling apparatus; apparatus (being parts of water purification installations) for introducing gases into water and wastewater; aeration apparatus for water and wastewater; filters for drinking water; water filtering apparatus; water purifying installations, particularly installations for water treatment under osmotic process; water purifying apparatus and machines; filters for use in purification installations for sewage; waste water treatment plants containing liquid separators for separating water and liquid or solid pollutants and contaminants; odor trapping siphons for sanitary installations; flotation units, namely water purification plants for removing substances dispersed or suspended in water by means of transport through adhesive gas bubbles to the surface of the water and removal of the substances from the surface of the water using a scraping device; neutralisation columns for waste water treatment; clarification tanks for industrial purposes; biological reactors for clarifying industrial effluents; water filtration apparatus; apparatus for disinfecting water; parts for the aforesaid machines and installations.