#bulldozer__dozer  large powerful tractor; a large blade in front flattens areas of ground
  supertype:  #tractor  a wheeled vehicle with large wheels; used in farming and other applications
  subtype:  #angledozer  a bulldozer with an angled moldboard to push earth to one side
  part:  #caterpillar_tread__caterpillartread__caterpillar_tracks  a belt around wheels to grip rough ground

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