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公开(公告)号：US3503699A
公开(公告)日：1970-03-31
申请号：US3503699D
申请日：1967-02-21
Applicant: BASF AG
Inventor： WELLENREUTHER GERHARD , BURKHARDT HANS , EILINGSFELD HEINZ
CPC classification number: D06P1/928 , C09B67/0075
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