37 Construction, works management; installation, repair, renovation and maintenance of rail and road infrastructures, surfaces and tracks, and equipment therefor; installation, repair, servicing, renovation, maintenance of rail vehicles for transporting passengers or merchandise, the aforementioned rail vehicles serving towns, suburbs and regions, rolling stock for railroads, including locomotives, freight cars, railcars and motor train units, railroad rakes with or without a motor train unit, articulated or non-articulated railroad rakes, storage tanks for the aforementioned rail vehicles, rail couplings, engines and motors (for vehicles) and parts therefor, pneumatic shock absorbers, transmission belts and the corresponding gears, air pumps (vehicle accessories), drive shafts, propulsion mechanisms, brakes, bogies, axles (for vehicles), electric motors (for vehicles), traction systems for the aforementioned rail vehicles; installation, seMcing, renovation, maintenance and repair of navigation, checking, measuring, signalling, detecting, inspecting, life-saving apparatus and instruments, rail traffic safety appliances, electric and electronic apparatus, fixed or embedded or placed on rail tracks for transmitting data on position and signalling between rail vehicles and control centres for managing and controlling rail and road traffic, rail vehicles and rail signalling equipment, particularly for locating and supewising trains, for securing railroad tracks and train traffic, for traffic control, for planning and managing rail vehicle fleets, power supply systems for rail vehicles, computer networks for managing trains based on communication consisting, particularly, of a central computer and communication networks, computers and computer peripherals, electronic and electrical equipment for processing satellite location data and electronic and electric apparatus for monitoring rail and road traffic, systems for analysing and diagnosing the condition of rail and road infrastructure equipment, fuel cells, hydrogen fuel cells, electric cells and batteries, road and rail infrastructures, surfaces and tracks, and equipment therefor; all the aforementioned services being intended for rail vehicles for transporting passengers or merchandise, their infrastructures and equipment