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公开(公告)号：DE1642956A1
公开(公告)日：1971-06-03
申请号：DE1642956
申请日：1968-03-09
Applicant: BASF AG
Inventor： KASPER WERNER DIPL-ING , ERWIN DR NITZSCHMANN ROBERT , KOEHLER WALDEMAR DR , KNOTH JOHANN
IPC: G01F11/28 , G05D11/00
