| 摘要 |
<p>PROBLEM TO BE SOLVED: To record a large amt. of information while the size of a magnetic card itself is not increased. SOLUTION: Magnetic tapes A'-D' in which required information is preliminarily recorded are arranged in the same direction with a small space between tapes on the surface of a card body 2. By arranging these tapes A'-D' in such a manner that the azimuth in one tape is symmetric to the azimuth of the adjacent tape, a large amt. of information can be recorded while the size of the magnetic card itself is not increased.</p> |
