| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a water purifying porous concrete block constituted so that porous concrete blocks are laminated safely and efficiently even if an auxiliary material is not used and the whole surface of each of the porous concrete blocks is brought into contact with water to efficiently purify water. <P>SOLUTION: This porous concrete block is used for purifying water and a plurality of projected members, which have a semispherical, trapezoidal, conical, columnar, prismatic, rod-like, square or semicylindrical shape, are integrally molded on the bottom surface or bottom and side surfaces of the porous concrete block. <P>COPYRIGHT: (C)2004,JPO&NCIPI</p> |
