详细解释:n. 通报者, 信号器
【化】 报讯器
英语解释：
名词 annunciator:
an indicator that announces which electrical circuit has been active (as on a telephone switchboard)详细解释：
an.nun.ci.a.tor
n.（名词）One that announces, especially an electrical signaling device used in hotels or offices to indicate the sources of calls on a switchboard.信号器，示号器：宣告物，尤指饭店或办公室中使用的一种电子信号装置，用来指示交换台上的呼叫信号来源