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公开(公告)号：US2893880A
公开(公告)日：1959-07-07
申请号：US61913056
申请日：1956-10-30
Applicant: STANDARD OIL CO
Inventor： DIEMAN EDGAR A , SWANSON ALF T
IPC: C23F11/10
CPC classification number: C23F11/10
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