{
  "source": "analytic",
  "method": "L prism (area 736, perimeter 200) x 20 minus cavity = L shrunk by 2 (SolidCraft's intersection-join shell convention: inner faces offset by 2 and extended to meet, sharp inner corner at (6,6); area 352) from z=2 to 20. A rounded (arc) join would give V 8368.5487, A 8768.5487, 16 faces",
  "body_count": 1,
  "volume_mm3": 8384.000000000004,
  "area_mm2": 8784.000000000004,
  "center_of_mass": [
    21.26717557251906,
    11.267175572519093,
    9.244274809160306
  ],
  "bbox": {
    "min": [
      0.0,
      0.0,
      0.0
    ],
    "max": [
      60.0,
      40.0,
      20.0
    ]
  },
  "faces": 15
}