{
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        7.136811856404234e-14
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      "type": "rational_polynomial"
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      "description": "sigma = sum(a_i*(1-T/Tc)^n_i)", 
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    "FH": 1, 
    "GWP100": 4750.0, 
    "GWP20": 6730.0, 
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  "NAME": "R11", 
  "REFPROP_NAME": "R11", 
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}