| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To proliferate diatoms and animalcule groups preying on these, thereby enhancing improvement of water quality, and sustainment and development of an under water ecological system. <P>SOLUTION: The dissolved silicic acid replenishing block comprises Shirasu, cement, and water, and has open pores. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
