简单桌面风扇外壳 Simple desktop fan shell

适合120mm，厚度25mm方形风扇

需要长度不少于20mm的M6螺栓以及螺母2套，长度不少于35mm的M3螺丝以及螺母4套

工程文件里有前后网，我自己偷懒没有打印

风扇可以上下摇头，方便实用

Suitable for 120mm, thickness 25mm square fan.

M6 bolts and 2 sets of nuts of length not less than 20mm, 

M3 screws and 4 sets of nuts of length not less than 35mm are required. 

Project documents have front and back net, I lazy did not print. 

The fan can shake the head up and down, convenient and practical.