This is similar to the second failure patients, but also the issue of the volume potentiometer.
这例故障类似第二种，也是音量电位器的问题。
In the contemporary acoustic equipment, usually USES the potentiometer to carry on the volume control.
在当代的音响设备中，通常采用电位器进行音量调节。
In the contemporary acoustic equipment, usually USES the potentiometer to carry on the volume control.
在当代的音响设备中，通常采用电位器进行音量调节。
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