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1.发明授权
公开(公告)号：US2659758A
公开(公告)日：1953-11-17
申请号：US3574448
申请日：1948-06-28
Applicant: SHELL DEV
Inventor： DETLING KENNETH D , THURSTON SKEL
CPC classification number: B01J38/12 , C07C45/34 , C07C45/35 , Y02P20/584 , C07C47/22
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