探讨刮水电动机复位滑环的结构、工作过程、复位误差，使用中存在的问题。
This paper discusses the working procedure, replacement error and the problems in operation of the replacement slip annulus of wiper motor.
表明该法可提高伤椎解剖复位率，减少误差及术后不良并发症。
It was believed that this method could improve the anatomic reduction rate and reduce errors and postoperative bad complications.
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