| 摘要 |
<p>The device (1) comprises two or multiple annular, elastic deformable sealing elements (2,4,6,8,10,12) having different internal diameter and detachably arranged coaxial inside one another. A positioning unit (14,16,18,20,22) is provided, which is adapted to one or multiple possible positions of the sealing elements relative to each other. The sealing elements are formed partially conical corresponding to a longitudinal axis.</p> |
