A data medium that does not contain data other than a frame o f reference, for example, a pre-printed form, tape punched only with feed holes, a magnetic tape t hat has been erased.
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释义
一种不包括数据仅有参考结构的数据媒体。如预印格式、仅有中导孔的穿孔纸带、已清除的磁带等。
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