The existing of poypropylene can raise the liquid fraction ratio,especially the light oil ratio,so it can fortify the effect of the cracking reaction of polyene to light oil.是什么意思_The existing of poypropylene can raise the liquid fraction ratio,especially the light oil ratio,so it can fortify the effect of the cracking reaction of polyene to light oil.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句