| 摘要 |
The device has a cover for closing a wall opening with at least one field (4) of elastically expandable film (6) framed by a stiffer section (2,3). The film can be penetrated at least one predetermined point (C-E) to form a cable passage. The region of film that can be penetrated is enclosed by an annular bead (A) joined via an annular curved bridge (B) to a bounding region of the film in contact with the stiffer framing section of the cover.
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