{
  "assemblyFaces": [
    {
      "componentName": "shaft-1",
      "componentDisplayName": "轴",
      "componentPath": "assembly/shaft-1",
      "componentFileName": "shaft.SLDPRT",
      "faceIndex": 12,
      "faceKind": "cylinder",
      "areaMm2": 1884.96,
      "centerMm": [0, 0, 0],
      "bBoxMm": [-15, -15, -25, 15, 15, 25],
      "axisPointMm": [0, 0, 0],
      "axis": [0, 0, 1],
      "radiusMm": 15,
      "diameterMm": 30,
      "functionalRole": "cylindrical_mate_face",
      "surfaceProcessRole": "machined_cylindrical_fit_surface"
    },
    {
      "componentName": "bearing-1",
      "componentDisplayName": "轴承",
      "componentPath": "assembly/bearing-1",
      "componentFileName": "bearing.SLDPRT",
      "faceIndex": 8,
      "faceKind": "cylinder",
      "areaMm2": 1884.96,
      "centerMm": [0, 0, 2],
      "bBoxMm": [-15.1, -15.1, -23, 15.1, 15.1, 27],
      "axisPointMm": [0, 0, 2],
      "axis": [0, 0, 1],
      "radiusMm": 15.02,
      "diameterMm": 30.04,
      "functionalRole": "bearing_mount_face",
      "surfaceProcessRole": "precision_machined_bearing_seat_surface"
    },
    {
      "componentName": "housing-1",
      "componentDisplayName": "箱体",
      "componentPath": "assembly/housing-1",
      "componentFileName": "housing.SLDPRT",
      "faceIndex": 31,
      "faceKind": "plane",
      "areaMm2": 5000,
      "centerMm": [55, 0, 0],
      "bBoxMm": [55, -30, -30, 55, 30, 30],
      "normal": [1, 0, 0],
      "functionalRole": "planar_contact_face",
      "surfaceProcessRole": "machined_surface_candidate"
    }
  ]
}