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公开(公告)号：US2474603A
公开(公告)日：1949-06-28
申请号：US71761446
申请日：1946-12-20
Applicant: STANDARD OIL DEV CO
Inventor： VILES PRENTISS S , GOOSE ELZA Q
IPC: C23F11/16
CPC classification number: C23F11/161 , Y10S507/939
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