{
    "name": "Chamber",
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        {
            "position": [ 390, 400 ]
        }
    ],
    "flippers": [
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        },
        {
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        }
    ],
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            "end_angle": 90,
            "surface": "INSIDE"
        },
        {
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            "end_angle": 150,
            "surface": "INSIDE"
        },
        {
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            "start_angle": 270,
            "end_angle": 330,
            "surface": "INSIDE"
        },
        {
            "position": [ 493, 160 ],
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            "start_angle": 210,
            "end_angle": 270,
            "surface": "INSIDE"
        }
    ],
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        },
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        },
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        },
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        },
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        }
    ],
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        {
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            "b_start": [ 0, 1000 ],
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        },
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        },
        {
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        },
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            "a_end": [ 630, 0 ],
            "b_start": [ 630, 700 ],
            "b_end": [ 510, 620 ]
        }
    ]
}