| 摘要 |
A document cover formed of a thin sheet material of synthetic resin, includes a front cover portion, a rear cover portion, and a fold portion formed in a boundary portion between the front cover portion and the rear cover portion. The fold portion includes a plurality of fold lines formed at intervals, whereby the cover can be folded easily in the vicinity where documents are bound, and after the front portion of the cover is once opened, the opened state of the cover can be held as it is.
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