This invention set fastness stick on the over current implement noumenon, set close fit bore on the ripple needle, fixup the ripple needle by fastness stick in work time. When need to adjust density of ripple needle, pull the fastness stick that can rotate ripple needle on the fit stick and fixup the fastness stick again. Use expediently and not break and miss the ripple needle as repeat pull and insert that improve the use life of ripple needle.
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