目的针对单侧可调式枢椎椎弓螺钉定位器的不足，研制改进出一种双侧可调式侧方椎弓定位器。

Objective to develop an improved adjustable bilateral aiming device to substitute the old single-side one to guide lateral arch screw insertion of axis.

youdao

目的针对单侧可调式枢椎椎弓螺钉定位器的不足，研制改进出一种双侧可调式侧方椎弓定位器。

Objective to develop an improved adjustable bilateral aiming device to substitute the old single-side one to guide lateral arch screw insertion of axis.

youdao