A kind of CrF 3 based catalyst for HHFC 134a preparation by reacting HFC 133a with AHF via vapor phase fluorination is reported.是什么意思_A kind of CrF 3 based catalyst for HHFC 134a preparation by reacting HFC 133a with AHF via vapor phase fluorination is reported.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句