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公开(公告)号：US2199838A
公开(公告)日：1940-05-07
申请号：US15894437
申请日：1937-08-13
Applicant: STANDARD OIL DEV CO
Inventor： WESLEY TYSON CHARLES , HEMMINGER CHARLES E
IPC: B01J38/12
CPC classification number: B01J38/12
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