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         Railroad station: set of installations 
          of a railway, where passengers embark and disembark and goods are loaded 
          and unloaded. 
          Water tower: water container. 
          Tunnel: underground passage. 
          Viaduct: railway bridge. 
          Bridge: construction that allows passage between two points separated 
          by a depression or an obstacle. 
          Overpass: elevation of a railway over a highway so they do not 
          intersect. 
          Switch tower: site from which the switching of trains from track 
          to track is controlled. 
          Engine shed: place where locomotives are stored. 
          Electric lines: set of wires conducting electricity. 
          Swing bridge: movable bridge used to turn railway cars around. 
          Footbridge: narrow passageway. 
          Pylon: tower-like construction, usually a support. 
          Underground crossing: tunnel. 
          Platform shelter: covered area. 
          Main line: the most important track. 
          Signal gantry: construction over railway tracks that supports 
          signals. 
          Semaphore: apparatus whose arm indicates whether or not a track 
          is in use. 
          Water crane: handling equipment for loading trains. 
          Passenger station: set of buildings where train passengers embark 
          and disembark. 
          Level crossing: intersection of a road and a railway. 
          Freight section: set of buildings used for the loading and unloading 
          of freight. 
          Yard: place where railway cars are assembled into train. 
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