A common system is a drillunit that can be either vertically or axially mounted.
常用的是一个钻加工设备，既可以垂直安装也可以轴向安装。
2
The mathematical model of the precision drillunit with parallelogram linkage was brought up and its dynamic behaviors were analyzed with this mathematical model.
This article probes into the process step, method and the disposal of some other basic problems of a computer-aided design for multiple spindle drillunit, which is easy to use and popularize.