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公开(公告)号：DE2257642A1
公开(公告)日：1974-06-20
申请号：DE2257642
申请日：1972-11-24
Applicant: BASF AG
Inventor： BEYER KARL-HEINZ DR , MATSCHAT KARL DR , TRAPP HORST DR , WIRTH WOLFJOCHEN DR
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