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公开(公告)号：US2226134A
公开(公告)日：1940-12-24
申请号：US16222037
申请日：1937-09-02
Applicant: PERMUTIT CO
Inventor： OTTO LIEBKNECHT , HERBERT CORTE
IPC: B01J41/08
CPC classification number: B01J41/09
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