您要查找的是不是：
- 收音reception of a radio
- 扩音机loud-speaker
- 在大厅里安装扩音机to fix a microphone in the hall
- 电扩音机electric megaphone
- 收音网radio rediffusion network
- 车用扩音机vehicle microphone
- 收音台receiving station
- 广播扩音机broadcast loud-speaker
- 收音员listener
- 电话扩音机areiculator
- 收音站radio station
- 舰用扩音机shipborne megaphone
- 同步收音sync sound
- 扩音机控制板public addressor control panel
- 盒式收音放音机a radio cassette player
- GY2×275W扩音机GY2 ×275W loudspeaker
- 收音电唱机radiogramophone
- 无电源变压器扩音机transformerless power amplifier
- 收音录音机radio recorder
- 这种事例常常出现直线扩音机。Examples of this type are often found in linear amplifiers.
