lever jack
... thread layer 经纱层 thread lever 导纱杆 thread opener 开线机 ...
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本文还对导纱杆位置与粗纱退绕力矩的关系，进行了讨论。
The authors also dealt with the effect of positions of guide rod on unwindingroving tension, and the optimal position of guide rod was analysed and discussed.
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