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公开(公告)号：FI42530C
公开(公告)日：1970-09-14
申请号：FI126665
申请日：1965-05-26
Applicant: DEGUSSA
Inventor： GERD SCHREYER , OTTO WEIBERG , GUENTER GIESSELMANN
IPC: C01B15/023 , C01B15/02
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