用于；
；；；さ缂魈
，，，，，阻遏外界杂质、水汽与碰撞滋扰
，，，，，结构细密、绝缘性好
，，，，，包管电极检测与事情状态稳固可靠。。。。。

It is used to protect the electrode body from external impurities, moisture and collision interference. With precise structure and good insulation, it ensures stable and reliable detection and operation of the electrode.