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公开(公告)号：US2699375A
公开(公告)日：1955-01-11
申请号：US21522451
申请日：1951-03-13
Applicant: BASF AG
Inventor： ADOLF JOHANNSEN , WILLI DANZ , KARL FEES , WALTER KAMMERER
IPC: C01B17/52
CPC classification number: C01B17/52
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