| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a scrubber in which the state of a scrubbing matter and the suitable time to be replaced can be grasped easily and correctly. <P>SOLUTION: In the scrubber 8 having the scrubbing matter 40 including a non-volatile acid installed in a case 12, the scrubber 12 is totally or partly formed in transparency or translucency, and the scrubber matter 40 is impregnated with a coloring agent which is caused to react with a corrosive ingredient to form a colored salt and a reducing agent. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
