| 摘要 |
A closure 1 made of plastic, in particular for closing an aperture in a panel, comprises a body portion 2 adjoining which is a sealing lip 3 for contacting one side of the support, and a retaining ring 10 located opposite the sealing lip 3. The retaining ring 10 has two sealing surfaces for sealingly contacting against the surfaces of the support in the area of the opening on each side of the support.
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