needle latch
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针舌脱落是舌针失效的常见形式。
Latch drop-off is the common form of latch needle's failure.
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当针继续向下运动时，在旧线圈的作用下，针舌被关闭。
The movements of a latch needle in forming a knit loop are as follows.
结论：舌针治疗中风有较好的疗效。
Conclusion Tongue acupuncture has a better therapeutic effect on stroke.
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