7 machinery, mechanical apparatus and installations composed of pumps for conveying and pumping purposes; pumps for machines, cooling engines and as parts of motors; gas, air, fuel and oil filters, oil, fuel and dust separators, magnetic filters, filter bodies, filter funnels, strainers for removing impurities from liquids, air extractors, air condensers, droplet separators, adsorbers, fluid separators, phase separators and de-oilers being parts for machines, motors and engines; fuel filters and separators for fueling vehicles and airplanes; filter presses; centrifuge machinery; fuel filters for fueling vehicles and airplanes, combined with a pressure measuring and/or indicating devices connected to the filter; heat exchangers for machines; fuel delivery pumps for service stations and installations consisting thereof, refueling installations consisting predominantly of fuel delivery pumps; self-regulating fuel pumps for service stations