tape length indicator

例句：

1. 1.The tape length indicator on the tape player shows the remaining time on the tape.
   录音带上的磁带长度指示器显示了磁带上剩余的时间。
2. 2. The tape length indicator is essential for recording audio data.
   磁带长度指示器对于记录音频数据至关重要。
3. 3.The tape length indicator helps to ensure that the tape is not played beyond its intended length.
   磁带长度指示器有助于确保磁带不会被播放到其预定长度之外。