特殊用法alarm buzzer1.警报器clearing signal buzzer1.话终信号蜂鸣器high-frequency buzzer1.高频蜂鸣器temperature buzzer1.温度报警器test buzzer1.(检查收音机用)测试蜂鸣器variable note buzzer1.变调蜂鸣器warning buzzer1.警告蜂鸣器
