#rails__rail__track  a bar or bars of rolled steel making a track along which vehicles can roll
  supertype:  bar.artifact  a rigid piece of metal or wood; usually used as a fastening or obstruction of weapon; "there were bars in the windows to prevent escape"
  part of:  railroad_track  tramline
  subtype:  third_rail__thirdrail  a rail through which electric current is supplied to an electric locomotive

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