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公开(公告)号：US2673188A
公开(公告)日：1954-03-23
申请号：US25971051
申请日：1951-12-03
Applicant: STANDARD OIL DEV CO
Inventor： SCHEXNAILDER ROBERT E
IPC: B01J21/12
CPC classification number: B01J21/12 , Y10S502/513
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