| 摘要 |
The file includes a binding body which is superimposed with a plurality of binding sheets, a curved retaining portion which is curved toward the direction of the pocket sheets as the binding body extending when opened the cover, a curved subsidiary portion which fixes its back into an optional form; the binding body is adjacently provided to the curved retaining portion by forming an arch-shape toward the direction of a front cover portion and back cover portion extending from the inner side of the spine portion and the curved retaining portion is connected with the width shorter than the width of the spine portion to the inner side of the curved subsidiary portion at the outer side of the curved retaining portion to enable the end edge adjacently provided on the binding body to curve.
|
