| 摘要 |
<p>A perfected percolation type filter for aquariums, furnishing at least two compartments (1,2) communicating with eachother and with the aquarium tank (115), characterised by the fact of furnishing means designed to guarantee a constant flow of water in the filtering material (30,40,50), and by the fact of furnishing a modular and extractable container which contains the said material. <IMAGE></p> |
