| 摘要 |
A ring for surrounding a pool drain to permit a pool cleaner to easily traverse the pool drain without interfering with the traversing movement of the pool cleaner includes a central portion positioned to surround a pool drain. The central portion has a predetermined height. An outer portion is displaced a predetermined distance relative to the central portion. The outer portion has substantially the same predetermined height as the central portion. An intermediate portion extends from the outer portion to the central portion. The intermediate portion provides a surface of substantially the same height as the central portion and the outer portion for enabling a pool cleaner to easily traverse a pool drain.
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