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公开(公告)号：US2307895A
公开(公告)日：1943-01-12
申请号：US32548640
申请日：1940-03-23
Applicant: STANDARD OIL DEV CO
Inventor： NAIMAN CHESTER L , GRAHAM JOHN M
IPC: B01J8/04
CPC classification number: B01J8/0453 , B01J8/048 , B01J8/0492
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