The notification is by means of an attention light or an audible alarm.
该通知是用指示灯或声音报警来实现的.
Check audible alarm frequently to ensure that it is in good working order.
经常检查声音报警信号以确保其工作状态良好.
Alarm horn in place of solid state audible device.
警报喇叭替代固态声音设备.
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