The technique is composed of particle size grading, dry collection and superfine grinding, for recovery of the fines produced during preparation of FCC catalyst, so as to enhance yield of catalyst and reduce fines emission to atmosphere.是什么意思_The technique is composed of particle size grading, dry collection and superfine grinding, for recovery of the fines produced during preparation of FCC catalyst, so as to enhance yield of catalyst and reduce fines emission to atmosphere.在线翻译_英语_读音_用法_例句