| 摘要 |
The unit has a bottom box (7), and a cover (6a) for covering the bottom box. A filter (10) is arranged in the bottom box. A connection pipe (3) is connected to the cover, and a feed pipe (5) for air is connected to the bottom box. An air activating block (20) is arranged on the filter, and a large number of passages are formed in the air activating block. The air activating block is an ion exchanger for air.
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