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公开(公告)号：US3520937A
公开(公告)日：1970-07-21
申请号：US3520937D
申请日：1967-04-03
Applicant: BASF AG
Inventor： MOELL HANS , ECKERT ERNST , KERBER HORST , APPL MAX , HOHENSCHUTZ HEINZ , WALZ HELMUT
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