它是一台链式线迹缝纫机，纽洞的大小可以根据需要调节。
It is often a chain stitch machine and the size of the buttonhole can be altered to suit with requirements.
双线链式线迹工业缝纫机，该机具有体积小、转速高、耗能少、噪音低、维修方便等优点。
Double chain stitch industrial sewing machine, the machine has the advantages of small volume, high speed, low energy consumption, low noise, convenient repair.
钉纽扣缝纫机类型钉纽扣缝纫机可分为单线链式线迹和双线锁式线迹的两类。
Buttoning a sewing machine type buttoning a sewing machine can be divided into single thread chain line mark and double-thread lockstitch of two kinds.
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