| 摘要 |
The device comprises a longitudinally elasticated fixing member (1) having a shape-restoring force and being provided with a large-sized , first and second circular portion (11,12) at both ends, and a closure membrane (2) attached to the first circular portion and closing up a ring of it. The first circular portion is fixed in a ring and connected to the second circular portion (12) by a connecting portion extended from the fixed circular portion and progressively decreases in size toward the second circular portion. The second circular portion may have a holding portion (13). |
