It is often a chain stitch machine and the size of the buttonhole can be altered to suit with requirements.
它是一台链式线迹缝纫机，纽洞的大小可以根据需要调节。
Double chain stitch industrial sewing machine, the machine has the advantages of small volume, high speed, low energy consumption, low noise, convenient repair.
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。
A case study of the high-speed chain-stitch sewing machine is used to illustrate the method.
并以工业高速链式平缝机为例进行了研究。
A case study of the high-speed chain-stitch sewing machine is used to illustrate the method.
并以工业高速链式平缝机为例进行了研究。
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