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         Propeller engine: engine of propulsion 
          or traction equipped with blades. 
          Carburetor: apparatus where fuel is mixed with to feed an internal 
          combustion engine. 
          Crank: arm perpendicular to an axle used to create circular motion. 
          Piston: cylindrical part that moves up and down in a tube and 
          transmit power produced by the fuel. 
          Cylinder: type of roller that applies uniform pressure. 
          Valve: regulation device. 
          Exhaust: device composed of parts that allow the expulsion of 
          spent gases. 
          Propeller blade: blade, arm of the propeller. 
          Spark plug: ignition device of an internal combustion engine. 
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