固定方式：

m3 螺丝+土八路热熔螺母（>4mm）

保留延长杆子+凹槽干燥箱子

1.更方便固定打孔. 2. 避免单边受力，导致干燥箱变形（三角稳定原理）。

3.温湿度计，采用方形温湿计。

4.干燥盒左右留有空隙，方便取出。（取出，可先拿掉温湿度计，利用凹槽更容易拿出来）

Fixed method:
M3 screw+earth eight way hot melt nut (>4mm)
Retain extended pole+groove drying box
1. More convenient for fixing and punching holes 2. Avoid unilateral force that may cause deformation of the drying oven (triangular stability principle).
3. Temperature and humidity meter, using a square temperature and humidity meter.
4. There are gaps on the left and right sides of the drying box for easy removal. (To remove it, you can first remove the temperature and humidity meter, making it easier to remove it using the groove.)