{
  "view": {
    "direction": "+Z",
    "rollDeg": 0,
    "drawingBBox": {
      "minX": -20,
      "minY": -20,
      "maxX": 60,
      "maxY": 20
    }
  },
  "dimensions": [
    {
      "id": "dim_fit_001",
      "text": "Φ30 H7/h6",
      "measurementMm": 30,
      "kind": "cylindrical_fit",
      "ownerComponents": ["轴", "轴承"],
      "anchors": [
        {
          "id": "shaft_side",
          "bbox": {
            "minX": -15,
            "minY": -15,
            "maxX": 15,
            "maxY": 15
          }
        },
        {
          "id": "bearing_side",
          "bbox": {
            "minX": -15.1,
            "minY": -15.1,
            "maxX": 15.1,
            "maxY": 15.1
          }
        }
      ]
    }
  ]
}