| 摘要 |
<p>An accessory for a swimming pool cleaner 1-5 consists of a rim 7 mounted on pipe 4 adjacent hose 6, the arrangement being such that the new contacts the wall of the pool before the cleaner is able to reach a position where forces acting on it prevent it from moving. In a modified form, the rim forms part of a cage around pipe 4. <IMAGE></p> |
