mercury circuit breaker

例句：

1. 1.The mercury circuit breaker is designed to prevent electrical fires in power systems.
   水银断路器的设计目的是为了防止电力系统中的电气火灾。
2. 2.The mercury circuit breaker was the first device invented to protect people from lightning strikes.
   水银断路器是第一个被发明用来保护人们免受雷击的设备。
3. 3.The mercury circuit breaker is used in many industrial applications to protect equipment from overheating.
   水银断路器在许多工业应用中被使用，用来保护设备免受过热。