| 摘要 |
A filter apparatus having a filter membrane, a main body, a supply channel running perpendicular to the surface of the filter membrane and a gap running between it and the filter membrane, for the formation of a tangentially directed transverse flow, a return channel connected with the supply channel, a circulation channel located around a circumferential edge of the membrane, having an inlet connected to the gap and an outlet connected to the return channel, and a circulator to impart a circular movement to the fluid in the circulation channel.
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