n.取消前言的人；收缩筋；牵引器
Disconnect retractor wire harness connector. 断开皮带卷收器线束接头。
A weighted retractor is in the vaginal cavity. **内有一个加了重量的牵引器。
Experimental application of auxometric nerve root retractor. 体感诱发电位；
MAIN OUTCOME MEASURES: Ratio of dragging force and nerve root retractor force;SSEP P1 latency. 主要观察指标：牵拉力与神经根牵拉比率、体感诱发电位P1波潜伏期的关系。
After exposing the cervical spine the self retaining retractor is placed to provide optimal visualization. 垫起颈后部，以确定和保持正常的颈的生理弯曲。
