37 Installation, servicing, maintenance, repair, retrofitting and renovation services, all relating to ventilation apparatus and equipment, conveyors, elevators, moving walkways, moving platforms, escalators, lifts, hoists and moving stairways and parts thereof; installation, servicing, maintenance, repair, retrofitting and renovation of electronic equipment for use in connection with ventilation apparatus and equipment, conveyors, elevators, moving walkways, moving platforms, escalators, lifts, hoists and moving stairways; information, advice and consultancy in the field of installation, servicing, maintenance, repair, retrofitting and renovation services, all relating to ventilation apparatus and equipment, conveyors, elevators, moving walkways, moving platforms, escalators, lifts, hoists and moving stairways and parts thereof, and installation, servicing, maintenance, repair, retrofitting and renovation of electronic equipment for use in connection with ventilation apparatus and equipment, conveyors, elevators, moving walkways, moving platforms, escalators, lifts, hoists and moving stairways