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Pneumatic door openers and closers for vehicle doors, in particular automatically operated railway vehicle doors; electric door openers and closers for vehicle doors, in particular automatically operated railway vehicle doors.Mechanically and/or pneumatically and/or hydraulically and/or electromechanically and/or electromagnetically and/or electrically and/or electronically-operated, controlled and controlling measuring, signalling, checking (supervision), controlling, regulating, recording, amplifying and monitoring equipment and apparatus; data processing apparatus; peripherals adapted for use with computers; software; computer programs, downloadable; computer programs, recorded; sensors for railway vehicle door systems; control apparatus for electric and electro-pneumatic door openers and closers for vehicle doors, in particular for railway vehicle doors and for extendable and retractable boarding aids for railway vehicles, in particular ramps, sliding steps and folding steps; controls for vehicle doors; control apparatus for pneumatic door openers and closers for vehicle doors, in particular for railway vehicle doors and for extendable and retractable boarding aids for railway vehicles, in particular ramps, sliding steps and folding steps.Vehicle doors, in particular automatically operated railway vehicle doors, in particular exterior doors, interior doors, connecting doors, sliding doors, driver's cab doors, pivot sliding doors, swing doors; boarding aids for railway vehicles, in particular ramps, sliding steps, folding steps, gap bridging devices; trapping protection devices as parts of vehicle door systems; parts of the aforesaid goods; aforementioned goods in particular for trams and urban railways, underground and over ground railways, passenger coaches and high-speed trains.Maintenance and repair of vehicle door systems, in particular automatically operated railway vehicle door systems; assembly, modernisation, maintenance, overhauling and repair of vehicles; assembly, installation, modernisation, maintenance, overhauling and repair of electric and electronic apparatus, in particular in vehicles; vehicle repair consultancy; advisory services relating to the maintenance and repair of mechanical and electrical equipment.