Using PEG-20M/Chromosorb WAW DMCS as a fixed phase, 3,5-xylidine and impurities would have been separated by gas chromatography on packed column.是什么意思_Using PEG-20M/Chromosorb WAW DMCS as a fixed phase, 3,5-xylidine and impurities would have been separated by gas chromatography on packed column.在线翻译_英语_读音_用法_例句