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Electrical and electronic apparatus for controlling and monitoring refinery plant and service stations, in particular for environmental protection purposes; sensors for gauging filling levels, leaks and leak tightness; commands for pumps and pumping actions; parts of all the above goods. Installations and apparatus for operation, ventilation, pumping, purification, separation, clarification and filtration of fluids, venting gases and waste water in refinery plant and service stations. Materials for sealing, packing and insulation; semi-finished synthetic resins; insulating paint; semi-finished filtration membranes; sheets and textures of metal or plastics for insulation and packing. Installation, maintenance, cleaning, sealing, lining, reconditioning and repairs to refinery plant, service stations, petroleum pipes and fuel tanks. Consultancy on environmental protection; consulting and and technical projects on sanitation and environmental protection for refinery plant and service stations.