#bumper_guard  vertical bars attached to a bumper to prevent locking bumpers with another vehicle
  supertype:  #mechanical_device  mechanism consisting of a device that works on mechanical principles
  part of:  #bumper  a mechanical device consisting of bars at either end of vehicle absorb shock and prevent damage
     part of:  #car__auto__automobile__machine__motorcar  4-wheeled motor vehicle; usually propelled by an internal combustion engine; "he needs a car to get to work"
     part of:  #truck__motortruck  an automotive vehicle suitable for hauling

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