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公开(公告)号：US3227790A
公开(公告)日：1966-01-04
申请号：US35594764
申请日：1964-03-30
Applicant: DEGUSSA
Inventor： GUNTHER BRETSCHNEIDER , PETER KUZEL , HORST PISTOR , FRITZ SPERR
CPC classification number: B01J2/00 , C01B15/12 , C01B15/123 , C01B15/126
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