| 摘要 |
<p>The invention relates to a filtering structure (R1, S1, S2) with a layering sequence comprising a number of layers (B1, B2, B3) formed from porous material. A layering sequence or a number of such layering sequences are formed inside a substrate in addition to the first layering sequence and are arranged in a staggered depthwise manner in relation to the first layering sequence. In this filtering structure, it is useful and advantageous that said additional layering sequence(s) perform(s) a filtering function differing from the first layering sequences.</p> |
