fuse-switch unit

例句：

1. 1. The engineer replaced the old fuse switch with a new one.
   工程师用一个新的替换了旧的保险丝开关。
2. 2.The technician quickly identified the problem and replaced the fuse switch.
   技术员迅速识别出问题并更换了保险丝开关。
3. 3. The circuit breaker was used to isolate the faulty fuse switch.
   电路断路器被用来隔离故障的保险丝开关。