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公开(公告)号:DE2161083A1
公开(公告)日:1973-06-14
申请号:DE2161083
申请日:1971-12-09
Applicant: BASF AG
Inventor: MICHEL HANS-JUERGEN DR , UHL KARL DR ING , SEIBERTH HANS DR ING , LOEWENBERG GUSTAV DIPL ING , REIMER DIETER
IPC: H01F1/06 , G11B5/845 , G11B5/84