所有后档缝应当用双针链式缝迹或双行锁式线迹。
All back rise seams should be two-thread chain stitch or double row lock stitch.
样品间里配备的工业用缝纫机，它们是锁式线迹缝纫机、包缝机、万能机等。
The sample room is equipped with industrial power machines: there are lock stitch, overlock, zigzag machines, etc.
本系列高速平缝机械是单针对线锁式线迹平缝机，适用于缝制各种人造革、皮革、帆布、牛仔布等中厚缝料。
This machine is flat-bed sewing operation by single needle and it is suitable for all kinds of leather, synthetic leather, canvas.
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