needle chainstitch machine 单针链缝平车
double-locked chainstitch 双式链式线迹
CHAINSTITCH SEAM 链式线缝
locked chainstitch 双式链式线迹
doublelocked chainstitch 双式链式线迹
Double Needle Chainstitch 链式双针
skipped stitches-chainstitch 跳针
double-needle chainstitch sewing machine 双针链式线迹缝纫机
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