安装方法：

将上下体摞起来，对齐螺丝孔，固定四个螺丝即可；选择对应的敲落空进线，将所有的设备安置对应位置。

Installation method:

Will stack up in nakedness, and align the screw holes, four screws can be fixed;Choose corresponding knock dashed into the line, put all of the devices corresponding to the position.