| 摘要 |
An adsorbtion filter for water including a housing containing a plurality of layers of granules of different types of activated carbon material with the carbon material of a respective layer having substantially the same mesh size, apparent density and adsorbtive capacity, the layers being juxtaposed and the materials of the respective layers having decreasing internal pore size and increasing indices of retentivity proceeding in a direction from the inlet to the outlet of the filter.
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