Moreover, new structures of the riser reactor ends can also suppress the coke deposit on the FCC unit so that the on-stream period of the unit can be prolonged.是什么意思_Moreover, new structures of the riser reactor ends can also suppress the coke deposit on the FCC unit so that the on-stream period of the unit can be prolonged.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句