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公开(公告)号：US2875256A
公开(公告)日：1959-02-24
申请号：US33255253
申请日：1953-01-21
Applicant: SHELL DEV
Inventor： JULIUS HYMAN , ERNEST FREIREICH , LIDOV REX E
CPC classification number: C07C13/39 , C07C2/50 , C07C2602/42
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