In the Si Chuan Vinylon factory,in application of operation optimization of fractionating tower, concentration of methanol was increased from 94.47% to 96.28, annual benefit is 59.9*104 yuan (RMB).是什么意思_In the Si Chuan Vinylon factory,in application of operation optimization of fractionating tower, concentration of methanol was increased from 94.47% to 96.28, annual benefit is 59.9*104 yuan (RMB).在线翻译_英语_读音_用法_例句