Lesson 1 Introduction to microfiber
工業(yè)科技

        7.1.1 The definition and development of microfiberAt present,the microfiber has no accurate definition in the world. The definitions given byevery country are slightly different,but they all take the line density as standard. If the linedensity of PET is ......（本文共 6221 字）     [閱讀本文] >>