| 摘要 |
Filter for use in building air ventilation and dust sepn. in industrial process air comprises a filter frame (1) of biological fibre material, pref. wood and/or wood fibres and/or well board material, and a filter module (2) of a biological fibre material contg. flax and/or cotton and/or wool. The filter module includes at least one filter pocket (3-6), the front portion of which has projections for fastening to the frame. |
