捻向是指在纺织行业中，纱线加捻的方向。
捻向（direction of twist）：加捻后，单纱中的原丝或股纱中的单纱呈现的倾斜 方向。从右下角倾向左上角的为S 捻；从左下角倾向右上角的称为Z 捻。
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纱线通常因为太细使得肉眼很难识别其捻向。
Often yarns are too fine to allow the unaided eyes to discern the twist direction.
影响帘线芯股捻距大小的主要因素为牵引线速度、旋转体转速、加捻段的距离和捻向。
The main factors affecting lay length of core strand of steel cord are draught speed, rotating speed of revolver, distance of laying, twist direction.
为了防止纱线的变形，将具有不同捻向的两根单纱并合在一起，可以制成平衡纱线或不卷缩纱线。
To prevent the distortion, a right- hand and a left- hand twisted single are combined to form a balanced yarn.
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