“信号器”的英语可以翻译为：annunciator，ringer，announciator ...

当我们把船调头的时候，信号器又不停地发出哔哔声。When we turned the boat about, the signal began to bleep again constantly.交变系统,使一段给定路段上的信号器,展现相反的指示.The alternate system allows signal installations along a given length of road to show contrary i...