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B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
B01D—SEPARATION
B01D33/00—Filters with filtering elements which move during the filtering operation
B01D33/04—Filters with filtering elements which move during the filtering operation with filtering bands or the like supported on cylinders which are impervious for filtering
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FR408741A1909-11-081909-11-08Dispositif automatique pour débarrasser les canaux des feuilles mortes, du bois mort, des glacons ou autres
ExpiredFR408741A
(fr)