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2Signification: strainfilter sift screen sortgrade refine riddle winnow
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3Signification: purifyrefine clean disinfect processpurge filter strain decontaminate
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4Signification: filter intofilter penetrate permeate pervadesaturate percolate infiltrate
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5Signification: activitypurify refine decontaminate disinfect processpurge filter strain clean