“继电器”用英语怎么说？

图 4-9 中使用的机械式继电器, 可以用电子开关来代替.The mechanical relays , which have been assumed in Fig . 4 - 9 , can be replaced by electronic switches.用继电器操作的一种可视信号或音响信号装置, 用以指示有关电路的情况.A visual or audible signaling device , operated by re...

“继电器”的拼音为：jì diàn qì...