| 摘要 |
PROBLEM TO BE SOLVED: To solve the following problem of a conventional sheet retaining string: the easy disengagement of the string by itself, damage to the landscape, the scattering of the sheet retaining string, and enormous labor costs. SOLUTION: There is provided a sheet retaining hook which is formed of a plastic or iron, but it may be formed of any other material. This hook rigidly retains the sheet and therefore it is not detached from the sheet. Further the hook has a different color depending on the sheet, and therefore it fits for the landscape. The hook is easily attachable to/detachable from the sheet, which leads to reduction in labor cost. COPYRIGHT: (C)2004,JPO
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