#belt.loop  endless loop of flexible material between two rotating shafts or pulleys
  supertype:  #loop.round_shape  anything with a round or oval shape (formed by a line or cord etc.) that is closed or nearly closed
  substance:  #belting
  subtype:  #caterpillar_tread__caterpillartread__caterpillar_tracks  a belt around wheels to grip rough ground
     subtype:  #half_track  caterpillar tread goes around only rear wheels
  subtype:  #conveyer_belt__conveyor_belt__conveyer__conveyor__transporter  a moving belt that transports objects (as in a factory)
     subtype:  #luggage_carousel__luggagecarousel__carousel__carrousel__luggagecarrousel  carries luggage to air travelers
  subtype:  #driving_belt__drivingbelt  a belt that carries motion from a motor to the machinery
  subtype:  #fan_belt__fanbelt  a belt driven by the crankshaft that drives a fan that pulls air through the radiator

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