#transmission_line__cable__line  a conductor for transmitting electrical or optical signals or electric power
  supertype:  #conductor  comms#transmission_object (comms)
  subtype:  #coaxial_cable  #electrical_cable  #fiber_optic_cable  #power_line  #printer_cable
  part of:  #cable_television_service__cable__cable_television__cabletelevision__cable_system__cablesystem  a television system transmitted over cables
  part of:  #telephone_system__telephonesystem__phone_system__phonesystem  a communication system that transmits sound between distant points

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