| 摘要 |
An index cutter (I) forms a thumb index on a sheet. The index cutter (I) includes: a flat plate-shaped first base member (1) having a first blade portion; and a flat plate-shaped second base member (2) rotatable coupled to the first base member (1) and having a second blade portion. When the first base member (1) and the second base member (2) are rotated relatively to each other, a part of the sheet is cut by the first blade portion and the second blade portion.
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