There is mercury on the other side of this mirror. 镜子的另一边是水银。
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。