Application of non polyurethane,polyester polyurethane,polyether polyurethane and chain extender on the melt spinning of elastic fiber is introduced .是什么意思_Application of non polyurethane,polyester polyurethane,polyether polyurethane and chain extender on the melt spinning of elastic fiber is introduced .在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句