| 摘要 |
PROBLEM TO BE SOLVED: To improve searchability of stored optical disks. SOLUTION: A case main body 106 with a tray storing part for storing a plurality of disk trays stacked in the thickness direction and an opening 107 for inserting/removing the disk trays to/form this tray storing part and a lid body 108 which for closing/opening the opening 107 of this case main body 106 are provided. In addition, the case main body 106 has therein a step constituting part 111 for arranging the label displaying parts of the disk trays stacked in the tray storing part so as to form steps.
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