#exhaust_system__exhaustsystem__exhaust  system consisting of the parts of an engine through which burned gases or steam are discharged
  supertype:  system.instrumentality__unit  instrumentality that combines interrelated interacting artifacts designed to work as a coherent entity; "he bought a new stereo system"; "the unit consists of a motor and a small computer"
  part:  exhaust_manifold  exhaust_pipe  exhaust_valve  silencer.acoustic_device  tailpipe
  part of:  automobile_engine  the engine that propels an automobile
     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"

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