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公开(公告)号：US2609933A
公开(公告)日：1952-09-09
申请号：US3087948
申请日：1948-06-03
Applicant: MARGARET ROSS
Inventor： MARGARET ROSS
IPC: B01D29/15
CPC classification number: B01D29/15 , B01D29/48 , B01D29/52 , B01D2201/0453
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