#blade.cutting_implement  the flat part of a tool or weapon that (usually) has a cutting edge
  supertype:  cutting_implement__cuttingimplement  a tool used for cutting or slicing
  part:  knife_edge
  part of:  ax  knife  lawn_mower  pair_of_scissors  spatula  spatula.food_turner  sword
  subtype:  knife_blade__knifeblade  the blade of a knife
  subtype:  razorblade  a blade that has very sharp edge

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