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Greenhouse gases / Refrigerants / Environment / Earth / Heating /  ventilating /  and air conditioning / Ozone layer / 1 / 1 / 2-Trichloro-1 / 2 / 2-trifluoroethane / United States Environmental Protection Agency / Communication Function Classification System / Chemistry / Ozone depletion / Chlorofluorocarbons


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Document Date: 2014-07-21 15:45:44


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