{
  "version": "0.1",
  "nodes": {
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      "name": "cube_30",
      "op": {
        "type": "Cube",
        "size": {
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          "y": 30,
          "z": 30
        }
      }
    },
    "2": {
      "id": 2,
      "name": "cube_centered_xy",
      "op": {
        "type": "Translate",
        "child": 1,
        "offset": {
          "x": -15,
          "y": -15,
          "z": 0
        }
      }
    },
    "3": {
      "id": 3,
      "name": "hole_cylinder",
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        "type": "Cylinder",
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        "height": 30,
        "segments": 32
      }
    },
    "4": {
      "id": 4,
      "name": "hole_-8_-8",
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        "type": "Translate",
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        }
      }
    },
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      }
    },
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        }
      }
    },
    "7": {
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          "z": 0
        }
      }
    },
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          "y": 0,
          "z": 0
        }
      }
    },
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        }
      }
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          "z": 0
        }
      }
    },
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        "type": "Translate",
        "child": 3,
        "offset": {
          "x": 0,
          "y": 8,
          "z": 0
        }
      }
    },
    "12": {
      "id": 12,
      "name": "hole_8_8",
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        "type": "Translate",
        "child": 3,
        "offset": {
          "x": 8,
          "y": 8,
          "z": 0
        }
      }
    },
    "13": {
      "id": 13,
      "name": "union_row1_a",
      "op": {
        "type": "Union",
        "left": 4,
        "right": 5
      }
    },
    "14": {
      "id": 14,
      "name": "union_row1",
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        "type": "Union",
        "left": 13,
        "right": 6
      }
    },
    "15": {
      "id": 15,
      "name": "union_row2_a",
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        "type": "Union",
        "left": 7,
        "right": 8
      }
    },
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        "type": "Union",
        "left": 15,
        "right": 9
      }
    },
    "17": {
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      "name": "union_row3_a",
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        "type": "Union",
        "left": 10,
        "right": 11
      }
    },
    "18": {
      "id": 18,
      "name": "union_row3",
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        "type": "Union",
        "left": 17,
        "right": 12
      }
    },
    "19": {
      "id": 19,
      "name": "union_rows_12",
      "op": {
        "type": "Union",
        "left": 14,
        "right": 16
      }
    },
    "20": {
      "id": 20,
      "name": "union_all_holes",
      "op": {
        "type": "Union",
        "left": 19,
        "right": 18
      }
    },
    "21": {
      "id": 21,
      "name": "cube_with_9_holes",
      "op": {
        "type": "Difference",
        "left": 2,
        "right": 20
      }
    }
  },
  "materials": {},
  "part_materials": {},
  "roots": [
    {
      "root": 21,
      "material": "default"
    }
  ]
}