| 摘要 |
<p>The element (1) has a coarse filter medium (2) arranged in a cylindrical way, where fluid impinges in a perpendicular way on a circumferential surface of the medium for filtering in an associated filter apparatus, and penetrates and passes through the surface. The coarse filter medium and a fine filter medium (3) with filter density are stacked upon each other as filter layers and being jointly wound in a spiral manner, where the fine filter medium is different from the coarse filter medium.</p> |
