Compared with CMMS method,the primary catalyst dosage can be reduced from 78 g to 53 g per reactor,the polypropylene products with melt index 0.2~0.3 g/10 min are produced easily by control of no hydrogen addition.是什么意思_Compared with CMMS method,the primary catalyst dosage can be reduced from 78 g to 53 g per reactor,the polypropylene products with melt index 0.2~0.3 g/10 min are produced easily by control of no hydrogen addition.在线翻译_英语_读音_用法_例句