Consequently it not only serves as driving piece and locating piece, but also serves as measuring piece, it plays an important role in mechanical industry, and inversely the developing of industry demands of more high precise screw shaft. 因此,丝杠不仅用作定位、传动元件,还可用来传递位移,它在机械工业中具有重要的地位,而工业的发展也对丝杠精度提出了越来越高的要求。
Locating Method of Imaging Electromagnetic Navigating for Internal Fixation with Lumbar Pedicle Screw 腰椎弓根螺钉内固定术中影像电磁导航的定位方法