FA478 increases the itinerancy pneumastic suction motion ,it makes the roving yarn evenness to improve.

FA478还增加了巡回式吹吸风装置，使粗纱条度明显提高。

Used for rocking cottonwool and spun silk yarn into sliver and rocing with a certain length in order it measure its evenness.

用于摇取棉、毛、绢等条子和粗纱成一定长度，以测定其度。

Fantasy yarns mixed to flat ones, never very thick, with different aspect: boucle, jaspe, vrille, hairy, felted, tweed, but never exaggerated.

较殊的纱线，本主题中并无粗纱，纱线外观有不同的变化：小圈圈、异色合股、螺旋、多毛、缩绒等，但都不会有太夸张的表现。

The thesis explain the production process and process specification of the raw material pretreatment, scutching. dressing. drawing. roving. spun yarn.

阐述了原料预处理、清花、梳棉、并条、粗纱、细纱的生产工艺和工艺原则。

Ratching in roving.

粗纱成形齿轮。