The hydrogen regulation has less effect on the activity of CSI catalyst and the stereoregularity of product.The stereoregularity of polypropylene is high with low content of ash.是什么意思_The hydrogen regulation has less effect on the activity of CSI catalyst and the stereoregularity of product.The stereoregularity of polypropylene is high with low content of ash.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句