The tail frame: installed in bed, and guide rail along the guide rail, adjusting to the longitudinal mobile work position.
尾架：安装在床身导轨上，并沿此导轨纵向移动，以调整其工作位置。
3
The structure of slide rail over and under type skid bed drawing steel rail has been introduced, and the strength and rigidity of main load -bearing slide rail have been calculated.