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B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
B01D—SEPARATION
B01D21/00—Separation of suspended solid particles from liquids by sedimentation
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FR827874D1936-10-141937-10-13Perfectionnements aux installations et bacs, à plusieurs chambres, épurateurs ou collecteurs d'eaux usées
ExpiredFR827874A
(fr)
Procédé et dispositif pour assurer l'épuration permanente de l'air et l'élimination des bactéries ou autres, ainsi que pour prcduire une humidification de l'air en toutes conditions désirées