摘要 |
A covering device (20, 30) comprises a sealing element (8) and a rib structure (11) which is disposed on a surface of the sealing element (8). The rib structure (11) comprises a plurality of ribs (12) which extend parallel to the surface of the sealing element (8), wherein the bendability of the ribs (12) parallel to the surface of the sealing element (8) is high, and perpendicular to the surface of the sealing element (8) is low. |