穿线时只需轻轻按动按纽，打线凸轮架便会弹起，即可简单地进行穿线，进一步提高操作工的工作效率。
When threading, only press the button gently, the CAM will be sprung upward. it can improve efficiency of work.
穿线时只需轻轻按动按纽，打线凸轮架便会弹起，即可简单地进行穿线，进一步提高操作工的工作效率。
When threading, only press the button gently, the CAM will be sprung upward. it can improve efficiency of work.
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