| 摘要 |
PROBLEM TO BE SOLVED: To obtain a small sized recording medium full of a handling property having a large capacity without a reduction of a storage capacity caused by forming a casing into a card size. SOLUTION: In this disk cassette 1, a pair of disk shaped recording media 3 is rotatably housed in the card sized casing 2, and moreover a pair of opening parts 12, 14 for reading/writing and opening/closing shutters 15 thereof are prepared in the casing 2 in accordance with respective recording media 3.
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