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公开(公告)号：US2648636A
公开(公告)日：1953-08-11
申请号：US21830951
申请日：1951-03-30
Applicant: RCA CORP
Inventor： ELLIS SIDNEY G , STEVENSON PETER C
IPC: B01J13/00
CPC classification number: B01J13/0039
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