| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a peephole of an ion exchange tower with satisfactory preventive effect of sticking of ion exchange resin, and sufficient peeling capacity of the stuck resin. <P>SOLUTION: Multiple linear slit grooves 3 are provided in the vertical direction to a surface 2 facing the tower inside, of a transparent plate 1 used for the peephole of the ion exchange tower. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
