作用一是用来压住环形导轨C，使其与凹槽D相配合，防止梭架从梭壳内脱落；
Action is to be used pin annular slideway C, make its and groove D photograph cooperate, prevent shuttle to wear from shuttle fall off inside housing;
用螺钉紧固在下轴上，以2nr/min（n为绣花机转速）转速沿梭架上的环形导轨C（导向齿）高速运转。
With snail clench solid is on lower shaft, with 2nr/min (N is embroider engine rotate speed) shuttle of rotate speed edge wears the annular slideway C that go up (oriented tine) high speed runs.
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