#butterfly_valve__butterflyvalve  a valve in a carburetor that consists of a disc that turns and acts as a throttle
  supertype:  #valve  control consisting of a mechanical device for controlling the flow of a fluid
  part of:  #carburetor__carburettor  mixes air with gasoline vapor prior to explosion
     part of:  #fuel_system  equipment in a motor vehicle or aircraft that delivers fuel to the engine
        part of:  #aircraft  a vehicle that can fly
        part of:  #motor_vehicle__motorvehicle__automotive_vehicle  a self-propelled wheeled vehicle that does not run on rails

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