The catalytic cracking unit in Changqing Petrochemical Branch Company,CNPC was revamped successfully by using of two-stage riser FCC(TSRFCC)technology.是什么意思_The catalytic cracking unit in Changqing Petrochemical Branch Company,CNPC was revamped successfully by using of two-stage riser FCC(TSRFCC)technology.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句