It was discussed that the mechanism of strengthening of paper wet in this paper. The characteris-tics and varieties of normal wet strength aid of paper was also introduced in detail.是什么意思_It was discussed that the mechanism of strengthening of paper wet in this paper. The characteris-tics and varieties of normal wet strength aid of paper was also introduced in detail.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句