The left-right rotating mechanism makes placing and adjustment easier, without the need to change the air pipe and reed switch. 左右旋转结构，方便放置和调整，不需更换气管及磁簧开关。
Mercury wetted reed switches are constructed in the same way as dry reed switches with the addition of a small amount of mercury inside the glass tube. 水银湿簧开关与干簧继电器的构造方式相同，仅仅是在玻璃管内部增加了少量了的水银。
