An S-twist yarn is one in which the fibers follow a spiral pattern parallel to the center bar of the letter s.
捻的纱线中的纤维成螺旋状并与字母s中间的斜杠平行。
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Worsted: Wool yarn made of long-staple fibres that have been combed to remove unwanted short fibres and make them lie parallel.
针织精梳毛纱：用经过精梳的羊毛长纤维纺成的毛纱。精梳时除去不需要的短纤维并使纤维平行排列。
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Carding: in yarn production, a process of separating individual fibres, causing many of them to lie parallel and removing most of the remaining impurities.