| 摘要 |
This method employs a clamp 9 and a plastic rail having two right angles for holding the pages, the number of which may vary so as to increase the range of use of said system. The flank 8 pivots 8'' by a groove at the intersection of the side 6 by the installing of the clamp which fits over the flank 8, slides over the side 6 and locks itself under the part 7. This provides spring pressure as the pages are pivoted upon. <IMAGE>
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