Polyaramide with easily rotational backbone has higher gas permeability, For two polymers with the same backbone, gas permeability is higher for one with methyl side group in its aroma-tic ring.是什么意思_Polyaramide with easily rotational backbone has higher gas permeability, For two polymers with the same backbone, gas permeability is higher for one with methyl side group in its aroma-tic ring.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句