{
  "independent_ranges": {
    "inner_radius_mm": [
      90.0,
      110.0
    ],
    "straight_length_over_radius": [
      3.5,
      4.5
    ],
    "dome_depth_over_radius": [
      0.55,
      0.7
    ],
    "boss_bore_radius_over_radius": [
      0.12,
      0.18
    ],
    "neck_length_over_radius": [
      0.15,
      0.25
    ],
    "liner_thickness_over_radius": [
      0.008,
      0.012
    ],
    "overwrap_thickness_over_radius": [
      0.025,
      0.035
    ]
  },
  "rule": "R in mm; all other independent parameters are ratios to R. Not every Cartesian-product combination is certified; eligibility required.",
  "baseline_parameters_mm": {
    "inner_radius_mm": 100.0,
    "straight_length_mm": 400.0,
    "dome_depth_mm": 60.0,
    "boss_bore_radius_mm": 15.0,
    "neck_length_mm": 20.0,
    "liner_thickness_mm": 1.0,
    "overwrap_thickness_mm": 3.0
  }
}