annunciator

• 名词，指一种显示或宣告哪条电路或信号已被激活的装置或指示器，例如用于电话交换机或控制面板上；也泛指信号器、报警器。

A noun referring to a device or indicator that displays or announces which electrical circuit or signal has been activated, such as on a telephone switchboard or control panel.

1. Electrical indicatorC1formaltechnical

   A device that indicates or announces which electrical circuit has been activated, often used on telephone switchboards or control panels.

   信号器

   • The annunciator lit up to show which line was ringing.
   • The technician checked the annunciator panel for any active alarms.
   • In older telephone exchanges, the annunciator helped operators connect calls efficiently.

   同义词alarmindicatorsignal