| 摘要 |
<p>The device has plastic U-profile strips fastened on a corrugated cardboard with a distance to a sheet protector in portrait format. Left and right stacks (B, C) with sheet protectors are threaded in terminal strips (F). The sheet protectors of the stacks are connected at handle edges (D, E) by a pushbutton and are pressed in the U-profile strips. The sheet protectors of the stacks include corresponding page numbers on front and rear sides and include turning aids (N) with page numbers for a next side to be turned.</p> |
