Lesson 2 The dipping technics
工業(yè)科技

        In dipping process,the impregnating solution is completely and uniformly distributedbetween the spaces of base by pressing and squeeze. The addition of PU makes the base formintegral structure from a macroscopical view,and the product has similar handle w......（本文共 28412 字）     [閱讀本文] >>