暗缝 meaning in English

stowing; false hem; side stitch; concealed [submerged] joint

Blind stitch cam 12 stitch
十二针暗缝凸轮
Blind stitch cam 8 stitch
八针暗缝凸轮
Blind stitch cam 4 stitch
四针暗缝凸轮
Blind stitch cam 6 stitch
六针暗缝凸轮
A single are needle sewing blind stitching , a sewing thread hook taking up thread , forming type 103 single thread chain stitch
单弧针摆刺料、摆动线钩勾线，形成103型单线链式线迹。采用圆筒式机构，适合袜子、手套、羊毛衫、裤管口等暗缝。