绞孔是半精加工基础上进行的一种精加工。一般绞孔的尺寸公差等级可达IT8～IT7，表面粗糙度R。值可达1.6～0.4。在实际加工中，常见的绞孔质量问题有表面粗糙度和尺寸精度差，孔口呈喇叭状等。
...密车削 (Precision Turning), 精密铣削 (Precision Milling), 搪孔 ( Boring ), 轮磨 (Grinding), 搪磨 (Honing), 绞孔 (Reaming), 研磨 (Lapping), 加油抛光 (Burnishing), 擦光 (Buffing), 超光制 (Super F..
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主要用来进行钻孔、扩孔、工科论文绞孔、攻丝等。
It is mainly be used for drilling, reaming, the cutter hole , tapping and so on.
结论：急性颈椎横突孔骨折患者椎动脉损伤的发生率较高，尤其伴小关节绞锁脱位者；
Conclusion:The incidence of vertebral artery injury after cervical transverse foramen fracture is quite high, particularly those associated with locked facet dislocation.
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