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A mechanism to describe the driving axles of the Propeller Arcs for Aviation, variables at will in a vertical planeWith the engine of the plane or Hydro Plane carried by this mechanism and arranged transversely in the device within or so
A mechanism to describe the driving axles of the Propeller Arcs for Aviation, variables at will in a vertical planeWith the engine of the plane or Hydro Plane carried by this mechanism and arranged transversely in the device within or so
