| 摘要 |
The invention relates to a frameless, plate-shaped filtering member comprising exterior filter layers ( 17 ) that encompass at least one layer of membrane material ( 19 ). At least one layer ( 12 ), at least one face of which is provided with elevations ( 15 ) that are distributed across the surface and are spaced apart from each other, is disposed between the exterior filter layers. The faces of said elevations form a contact area for another, preferably liquid-permeable layer ( 13, 14 ).
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