?电笛

... electric singal 电信号 electric siren 电笛 electric slewing crane 电动旋臂起重机 ...

?电警报器

... buzzer siren 蜂鸣报警器; 蜂音报警器 electric siren 电笛; 电警报器 fire siren 火警笛 ...

?电气报警器

... 电瓶车 battery car, accumulator car 电气报警器 electric siren 蜂鸣器 buzzer, buzzerphone ...

?电警笛

... electric simulation || 电模拟 electric siren || 电警笛 electric slag furnace || 电渣炉 ...