#hubcap  cap that fits over the hub of a wheel
  supertype:  #cap.protective_cover  something serving as a cover or protection
  part of:  #car_wheel__carwheel  a wheel that has a tire and rim and hubcap; used to propel the car
     part of:  #motor_vehicle__motorvehicle__automotive_vehicle  a self-propelled wheeled vehicle that does not run on rails

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