The stocking is raveling out.

袜子的线在散开来.

The whip - round is a long whip stitch overlying an edge to prevent raveling.

包缝针法为了防止散开而包着边儿缝的一种缝法.

The primary purpose of a seam finish is the prevention of raveling, stretching, or curling.

缝份的加工处理主要目的是防止毛边松散 、 伸长或卷曲.