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公开(公告)号：US2356118A
公开(公告)日：1944-08-15
申请号：US37925441
申请日：1941-02-17
Applicant: HONORARY ADVISORY COUNCIL SCI
Inventor： MONTGOMERY PIDGEON LLOYD , WILLIAM FREDERICK NORMAN
IPC: C01F5/32
CPC classification number: C01F5/32
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