#gearbox__gear_case  the shell (metal casing) in which a train of gears is sealed
  supertype:  #shell.housing__case__casing  the housing or outer covering of something; "the clock has a walnut case"
  part:  #transmission_shaft
  part of:  #transmission_system__transmission  the gears that transmit power from an automobile engine via the driveshaft to the live axle
     part of:  #drive_line_system__drive_line__driveline  mechanism that transmits power from the engine to the driving wheels of a motor vehicle
        part of:  #motor_vehicle__motorvehicle__automotive_vehicle  a self-propelled wheeled vehicle that does not run on rails

No statement uses or specializes #gearbox; click here to add one.