#lawn_mower__mower  garden tool for mowing grass on lawns
  supertype:  #garden_tool__lawn_tool  used for working in gardens or yards
  subtype: {#hand_mower #power_mower}
  part:  #blade.cutting_implement  the flat part of a tool or weapon that (usually) has a cutting edge
     part:  #knife_edge__knifeedge__cutting_edge__cuttingedge  the sharp cutting side of the blade of a knife

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