| 摘要 |
The filter unit is of the type comprising a casing (2), filter tubes (5) associated with a filtering surface (6), shaker means (7) for the filtering surface (6), a suction pipe (10) associated with the casing and a suction pipe (11) associated with one or more turbines and characterized in that the casing (2) comprises above the filtering surface (6) at least two separate chambers (13,13') each independently connected to the suction pipe (11) associated with one or more turbines.
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