Hearing aids components: microphone, receiver, volume control, and trimmer.
Hearing aids components: microphone, receiver, volume control, and trimmer.
助听器部件：麦克风、接受器、音量控制器和微调电阻等。
Hearing aids components: microphone, receiver, volume control, and trimmer.
助听器部件：麦克风、接受器、音量控制器和微调电阻等。