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CFCs
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CFCs
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制冷剂
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chlorofluorocarbon;CFCs
氯氟烃制冷剂
20世纪30年代初发明且开始使用的一种人造的含有氯、氟元素的碳氢化学物质,用于制冷机中完成热力循环。
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Ethiopia joins League of Nations
Ethiopian Church
Ethiopian English Literature
Ethiopian Highland
Ethiopian-Italian Treaty,1908
Ethiopian-Italian Treaty,1928
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Ethiopian People’s Revolutionary Democratic Front
Ethiopian protest against anglo-italian agreement
Ethiopians
Ethiopian-Somali Peace Agreement
Ethiopia Orthodox Church
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Ethiopia-U.S.Treaty of Commerce
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