| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an aeration device which can reduce a pressure loss due to aeration by generating fine bubbles, has high durability, and allows an easy maintenance and inspection. <P>SOLUTION: The aeration device is equipped with an aeration member with metal sheet having a number of fine pores or slits. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
