| 摘要 |
A file (100), provided with a front cover (2), a back cover (3) and a spine (4) connecting the covers, wherein a binding element is provided for detachably fixing sheets, between the front (2) and back cover (3), wherein at least the front cover (2) and the back cover (3) are provide with a longitudinal edge and wherein a closure element is provided, which can be coupled to at least one longitudinal edge, such that the space enclosed by the front cover (2), back cover (3) and the spine (4) is covered by the closure element and the file (100) with the closure element has a substantially closed box shape.
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