| 摘要 |
<p>The supporting floor (2), fitted with nozzles (3) that have orifices (16, 17) for air or water and project above and below the floor, has a series of transverse preforms (11) shaped to receive the nozzles, which are held in place by fixings (12, 13). The fixings are in the form of threaded sections on the inside of the preforms and matching threaded surfaces on the nozzles, with the tail of each nozzle held in place by a locknut (15). The treatment cell is fitted with a quick-opening valve to discharge treated water and a fine grille to avoid loss of filtering material during washing sequences.</p> |
