Nowadays, many sweaters are made of medium-length fiber instead of wool. 现在许多毛衣都不是羊毛制品，而是用中长纤维制作的。
This simple arrangement requires that the distance separating the roller nips must be comparable with the length of the longest fiber in the sliver. 这种简单的装置要求罗拉钳口夹持点之间的距离必须相当于银子中最长纤维长度。
