特殊用法alarm annunciator1.报警信号器approach annunciator1.接近预告器audible annunciator1.电子信号器flight mode annunciator1.飞行状态信号牌[指示器]glide slope annunciator1.下滑道信号牌needle annunciator1.指针示号器television fault annunciator1.电视故障报警器train annunciator1.车到发通告器[报告员]