#telecommunication_system__telecommunicationsystem__telecommunication_equipment__telecommunicationequipment  a communication system for communicating at a distance
  supertype:  #communication_system__communicationsystem  a system for communicating
  subtype:  #television_system__television  a telecommunication system that transmits images of objects (stationary or moving) between distant points
     subtype:  #cable_television_service__cable__cable_television__cabletelevision__cable_system__cablesystem  a television system transmitted over cables
     subtype:  #closed-circuit_television  a television system that is not used for broadcasting but is connected by cables to designated monitors (as in a factory or theater)
        subtype:  #surveillance_system  a closed-circuit television system used to maintain close observation of a person or group
     subtype:  #color_television_system__color_television__colortelevision__colour_television__colour_television_system__color_TV__colour_TV  a television that transmits images in color
        subtype:  #field-sequential_color_television_system__field-sequential_color_television__field-sequential_color_TV__field-sequential_color_TV_system  an early form of color TV in which successive fields are scanned in three primary colors

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