针迹距 distance between needle point tracers 针迹是机针在缝料上刺出的踪迹。针迹距是缝料上两个相邻针迹之间的距离。直向针迹距是在曲折缝中，平行于送料方向的投影距离；横向针迹距是曲折缝中，垂直于送料方向的投影距离。
采用电脑数字控制系统，针距、珠点、半针按钮，自动正反点、倒缝、花样线迹设定，一屏操作，轻松方便。
Adopt digital computerized control system, needle stitch , stitch length, Automatically positive and negative points, backstitch , stitch pattern setting , one screen operation, easy to operate.
倒顺送料针距可调，结构新超，保证了倒、顺缝纫线迹的一致性和运转的平稳性。
We can adjust the needle distance for forward and reverse stitch, based on new design, to guarantee to sew forward and reverse stitch smoothly and placidly.
25手提封包机采用双线链式、针距可调线迹， 适用于各种盛满物品的牛皮纸、 麻布、塑料编织袋封口之用。
JI 9 - 25 adopts lines architrave, suitable for sewing various bags , kraft paper, flaxand plastic knitting bags.
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