| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a means in which a filler can be easily regenerated and replaced and the life of the filler is extend. SOLUTION: In the water cleaning device, moldings which have surfaces having holes and form a cylinder by being arranged oppositely and being connected to each other, are connected cylindrically, and the cylinder is filled with the filler and installed in water to be cleaned.</p> |
