| 摘要 |
<p>PROBLEM TO BE SOLVED: To efficiently clean and activate water and to obtain water suitable for breeding fishes. SOLUTION: The air charger equipped with a rotary drive means 1, a hollow rotary shaft 2 arranged in water W to be rotated by the rotary drive means 1 and the capsule 4 provided to the lower end of the rotary shaft 2 and having a large number of air discharge small holes 3 bored therein. A large number of the air discharge small holes 3 bored in the capsule are arranged so as to be positionally shifted from the same circumference of a circle X and the same axial line Y.</p> |
