To resolve the problem of the point and direction of the fixation of Axis lateral arch screw, using navigator finds the safe trajectory.
针对枢椎侧方椎弓螺钉固定时确定进针点和进针方向困难的问题，通过导航仪寻找安全钉道。
Conclusion the superior lateral quadrant was the safe area of the cervical lateral mass screw. The safe exit point was the juncture between the transverse process and the facet.
结论颈椎侧块外上象限是螺钉植入的安全区，横突与关节突相交处是安全的出钉点。
Objective: to go to more exact point and direction during the screw fixation make sure to insert screw successfully by measuring the dimension of the lower cervical spine pedicle.
实验目的：本文目的基于进行下颈椎椎弓根的相关经线及角度测量，定位更准确的椎弓根进钉点、置钉方向，为成功应用经颈椎椎弓根螺钉技术提供必要信息。
CNC lathe; variable pitch screw; NC Program; on the cutting point; graphic method;
数控车；变螺距螺杆；NC程序；起刀点；图解法；
In the design of die casting die with screw thread, the automatic screw thread unloading is a difficult point.
铸件螺纹脱模是压铸模设计的难点之一。
The automatic screw thread unloading is a difficult point in the design of die casting die for castings with screw thread.
铸件螺纹脱模是压铸模设计的难点之一。
According to different products, driving point location and screw quantity can be set up at will. The machine is furnished with high-capacity memory module to store the data for different products.
根据不同产品可任意设置锁螺丝点位，螺丝数量，内置大容量记忆模块，可存取不同产品数据。
In the start strip point distance 400 mm installation of a screw...
沿起始条上每400毫米安装一个螺钉。
In the start strip point distance 400 mm installation of a screw...
沿起始条上每400毫米安装一个螺钉。
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