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公开(公告)号：US2606870A
公开(公告)日：1952-08-12
申请号：US69115246
申请日：1946-08-16
Applicant: PERMUTIT CO
Inventor： THOMAS PEMBERTON ROLAND , LEIGHTON HOLMES ERIC
IPC: B01J49/00
CPC classification number: B01J49/08
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