Also Relay Active annunciator.

还继电器主动报警。

Also Relay 1 Active annunciator.

还主动报警继电器1。

Fire detection and alarm system annunciator unit.

火灾探测和警报系统通知器单位。

Mosqyito trap, garden products, door bell, annunciator.

灭蚊器、花园用品、门铃、防盗器。

Annunciator is used by the rows of seeding convenient for stalling.

多行播种共用一个报警器，便于安装。