7 Rotary pumps, thick matter pumps, clarified sludge pumps, slurry pumps, slurry effluent pumps, watering pumps, vacuum pumps, water pumps, sewage pumps, including electric, hydraulic and mechanical drive units and electronic control and regulating installations therefor; crushing apparatus, namely, shredders for fibrous and coarse substances in liquids and suspensions; separators for hard and heavy substances in liquids; combination apparatus consisting of mixers, worms and pumps, crushers, separators and dryers for use in biogas installations and residual material processing installations, vacuum disposal installations and water supply installations, mainly consisting of rotary pumps, pipelines, shut-off valves, couplings and hoses, drive units and electronic switching, regulating and recording installations, slurry tankers for low-loss liquid manure distribution for attaching to tankers, watering and irrigation installations, namely, agricultural irrigation units, soil injection apparatus, namely, tanker-hooked booms fitted with grubbers, disk wheels or tines for injecting liquid manure into soil