| 摘要 |
<p>A cover set includes a ring (10) mounted on a bin (1), a cover (20) pivotally connected to the ring (10), means (30) for assisting the lifting of the cover (20) from the ring (10) and at least one buffer (40) for buffering the cover (20) near the end of the lifting so that the lifting is steady and quiet from the start to the end.</p> |
