| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To circulate and clean water of shallow water basins such as pools, ponds and swamps by using ceramic balls. <P>SOLUTION: The water quality improving equipment is provided with water activating means packed with the ceramic balls (3) in the inhalation side of a pump (2) and is provided with air intake means (21). <P>COPYRIGHT: (C)2003,JPO</p> |
