一个乱写或者空白的磁带标号确定一个磁带是用来临时存储数据的。
A scratch or blank tape designation identifies a tape to be used for the temporary storage of data.
一种磁带录音机带速反映磁带，用于检验录音机带速偏差，其特征在于它使用国家标准规定的空白录音带在其录音带的声轨上录制上每秒发出一次短促声响。
The magnetic tape with speech prompt for testing tape speed deviation of audio recorder can play its role only by inserting it into audio recorder. It is used to repair and calibrate audio recorder.
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