虽然针迹不是最牢固，但暗缝缲边线迹在衣片的正反面都看不见。

Though not the strongest of stitches, the slip hem is invisible on both right and wrong sides of the garment.

youdao

该系列有三线、四线、五线、六线等机种； 该系列有窄边、包边、倒回缝、暗缝等等机型；

This series include various models like narrow side, over- edging, reverse sewing and blind sewing.

youdao

该系列有三线、四线、五线、六线等机种； 该系列有窄边、包边、倒回缝、暗缝等等机型；

This series include various models like narrow side, over- edging, reverse sewing and blind sewing.

youdao