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公开(公告)号：US2345332A
公开(公告)日：1944-03-28
申请号：US40139841
申请日：1941-07-07
Applicant: HARRY ELLIS JOHN , STARK LEWIS B
Inventor： HARRY ELLIS JOHN , STARK LEWIS B
IPC: B01J4/00
CPC classification number: B01J4/008 , Y10T137/6606
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