Suction installations, in particular industrial vacuum cleaners, industrial suction units, hall ventilation installations; extraction arms; suction tables for liquids; fume hoods; accessories for suction installations; system components for suction installations, namely pipe, duct, hose and fastening systems, pre-separators, filter and discharge elements, compressor ventilators, controls; noise, fire and explosion protection systems (parts of machines) and noise, fire and explosion protection...