| 摘要 |
The invention relates to a prefabricated section 1 comprising a channel 7 flanked by two right-angled forms 8, by a rib 3 located towards the interior of the swimming pool and by a rim 9 which is substantially higher than the rib 3. A removable grille 11 rests on the right-angled forms 8. Application: refurbishing and improving the filtration of existing swimming pools. <IMAGE>
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