棉、毛等纤维以捻回缠合组成的纱称短纤纱，其结构复杂并因纺纱加捻方法不同而稍有差异。
2．纱的加工长纤维加工的纱——长丝纱（Filament Yarn）短纤维加工的纱——短纤纱（Spun Yarn）3．纱的捻度、捻向（1）捻度：每米长的纱加多少转（2）捻向： 顺时针捻转，S捻逆时针捻转，Z捻4．纱的细度（1）公制号数Tex, T, ...
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纱线形成之后，无论是短纤纱，还是连续长丝纱都不能立即用来生产织物。
After yarn formation, both spun and continuous filament yarns are not immediately usable in fabric forming systems.
针对纯细旦涤纶短纤纱和喷气织造工艺特点 ，合理制定了纯细旦涤纶短纤维经纱的上浆工艺 ，并取得了较好的织造效果。
The properties of fine denier polyester fiber and viscose fiber are introduced, and some factors affecting the yarn quality such as fiber properties and spinning process are analyzed.
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