{
  "version": "0.1",
  "nodes": {
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    "2": {"id": 2, "name": "plate_centered", "op": {"type": "Translate", "child": 1, "offset": {"x": -40, "y": -40, "z": 0}}},
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    "4": {"id": 4, "name": "corner_hole_1", "op": {"type": "Cylinder", "radius": 3, "height": 6, "segments": 32}},
    "5": {"id": 5, "name": "corner_hole_1_placed", "op": {"type": "Translate", "child": 4, "offset": {"x": 30, "y": 30, "z": 0}}},
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    "7": {"id": 7, "name": "corner_hole_2_placed", "op": {"type": "Translate", "child": 6, "offset": {"x": -30, "y": 30, "z": 0}}},
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    "9": {"id": 9, "name": "corner_hole_3_placed", "op": {"type": "Translate", "child": 8, "offset": {"x": 30, "y": -30, "z": 0}}},
    "10": {"id": 10, "name": "corner_hole_4", "op": {"type": "Cylinder", "radius": 3, "height": 6, "segments": 32}},
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    "12": {"id": 12, "name": "diff1", "op": {"type": "Difference", "left": 2, "right": 3}},
    "13": {"id": 13, "name": "diff2", "op": {"type": "Difference", "left": 12, "right": 5}},
    "14": {"id": 14, "name": "diff3", "op": {"type": "Difference", "left": 13, "right": 7}},
    "15": {"id": 15, "name": "diff4", "op": {"type": "Difference", "left": 14, "right": 9}},
    "16": {"id": 16, "name": "diff5", "op": {"type": "Difference", "left": 15, "right": 11}}
  },
  "materials": {},
  "part_materials": {},
  "roots": [{"root": 16, "material": "default"}]
}