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公开(公告)号：US3232701A
公开(公告)日：1966-02-01
申请号：US15559961
申请日：1961-11-29
Applicant: BASF AG
Inventor： GUENTER HANSEN , HANS MUELLER , OTTO SCHMITT KARL , KARL VOGEL
IPC: C01D7/12
CPC classification number: C01D7/123
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