. "100191980"^^ . . "0"^^ . "filtration"@en-us . . "00191980-n"^^ . "filtration"^^ . "100181372"@en-us . . . . . . . . "the act of changing a fluid by passing it through a filter"@en-us . "0"^^ . . "the act of changing a fluid by passing it through a filter"@en-us . .