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公开(公告)号：US2568181A
公开(公告)日：1951-09-18
申请号：US78836047
申请日：1947-11-28
Applicant: FRAM CORP
Inventor： ZIMMERMAN ROBERT M , KENNEDY WALTER V
IPC: B01D27/02
CPC classification number: B01D27/02 , B01D27/08 , B01D2201/4015
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