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B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
B01D—SEPARATION
B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
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FR539228D1921-08-101921-08-10Procédé et dispositif pour la clarification et l'épuration de la vapeur d'échappement et des eaux d'alimentation
ExpiredFR539228A
(fr)