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Chemical products used in industry in the field of activated carbon for bleaching, absorption, filtration and purification; filtering materials of unprocessed plastics, not included in other classes; activated carbon for technical purposes; membranes for filtration. Control devices for water and gas purifiers and filters; control devices for gas supply in water and gas purifiers and filters. Water filters, water filtering apparatus, instruments and devices; apparatus, instruments and devices for separating substances and/or liquids; all the aforementioned articles for domestic or industrial use; activated carbon apparatus; installations and apparatus for the purification of waste water and emissions; installations for the purification of flows of liquids, water, gas and air; filters being parts of industrial installations for cleaning waste water, emissions and flows of liquids, water, gas and air; fixed bed filters and activated carbon filters; parts and accessories for fixed bed filters and activated carbon filters; control and safety accessories for water and gas purifiers and filters; separators and flexible pipes for water and gas purifiers and filters; separators and flexible pipes for gas supply in water and gas purifiers and filters. Air purification and water treatment; transformation of plastics and provision of information relating thereto; treatment of raw materials; processing and treatment of plastic materials; rental of water treatment equipment; rental of water filters; treatment of waste water, water, gas or air flows; bleaching, filtering and purification of wastewater, water, gases or air currents and absorption of impurities contained in waste water, water, gas or air currents; rental of equipment and installations for bleaching, filtration and/or purification of waste water, water, gases or air flows and of equipment and installations for the absorption of impurities from waste water, water, gases and air flows.