当磁带完成录音或者卷带的时候，磁带计数器和自动停止是有用的。

Tape counter and automatic switch-off when tape has finished recording or rewinding are useful.

youdao

当磁带完成录音或者卷带的时候，磁带计数器和自动停止是有用的。

Tape counter and automatic switch-off when tape has finished recording or rewinding are useful.

youdao