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公开(公告)号：CH491821A
公开(公告)日：1970-06-15
申请号：CH1269368
申请日：1968-08-22
Applicant: BASF AG
Inventor： OPP KARL DR , WYGASCH EWALD DR , GIESLER ERICH DR , ALFRED JAHREISS , TOERPEIL GERHARD DR
IPC: C01G49/10
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