| 摘要 |
The cover is made from a transparent elastic material. The base foil is divided into at least four foil regions (3) by at least two crossing intended-bend strips (1) with a hole (2) at the crossing point. Their width is at least four times the thickness of the foil material. The foil regions are connected on at least one side to a covering foil (5), forming a pocket with the foil regions to which it is pressed.
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