{
  "source": "analytic",
  "method": "solved sketch: hull of circles R12 at (0,0) and R8 at (60,0) (outer tangent lines, cos a = 4/60) minus holes d12, d8 (concentric) and d4 at (30,+-4) (symmetry keeps radii equal); prism h6",
  "body_count": 1,
  "volume_mm3": 8045.386394390547,
  "area_mm2": 4308.174742415074,
  "center_of_mass": [
    26.196311954241445,
    -2.1175331398316964e-16,
    3.0000000000000004
  ],
  "bbox": {
    "min": [
      -12.0,
      -12.0,
      0.0
    ],
    "max": [
      68.0,
      12.0,
      6.0
    ]
  },
  "faces": 10
}