The features of PP hollow fiber membrane are that the hollow fiber membrane is nonsymmetrical and the section of the hollow membrance include two layers (cortical layer and bolster layer).是什么意思_The features of PP hollow fiber membrane are that the hollow fiber membrane is nonsymmetrical and the section of the hollow membrance include two layers (cortical layer and bolster layer).在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句