| 摘要 |
The ring filter (1) has an annular body (13) for stationary arrangement in a retainer and another annular body (14) that is moved in the retainer. A filter material (12) is adjusted between the both annular bodies. The filter material is partly moved by the arrangement at the latter annular body. The filter material is made of permanent elastic or flexible material, particularly plastic material or a fabric material or a knitted fabric or a textile. |
