{
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  "levels": [
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   14375.0,
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 },
 "section": {
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   "1080.0": 60
  },
  "first_deg": 0.001,
  "pitch_deg": 6.0,
  "tie_lines": 2295.0
 },
 "main_hooks_drawn": {
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    12645.0,
    270.0
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   [
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    270.0
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   [
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  "outer": "outwards (centre r 1,395)",
  "inner": "inwards (centre r 810)",
  "top_z": 20907.8,
  "straight_from_drawn": 12645.0
 },
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 ],
 "check": {
  "hoops_chain_equals_drawn": true,
  "n_hoops": 29,
  "n_tie_levels": 20
 }
}