| 摘要 |
The closure ring (1) has an upper edge (6) at a distance from the extractor hood (3) to form an annular gap (7) between them, sealing elements (8) distributed around the ring, whereby a sealing element has a box (9) for a sealant (10) consisting of a number of temperature-resistant sealing particles and the sealant is in contact with the hood. |
