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公开(公告)号：US3087935A
公开(公告)日：1963-04-30
申请号：US8912861
申请日：1961-02-14
Applicant: CIBA LTD
Inventor： DJAVAD RAZAVI , WALTER FIORONI , ULRICH MEISTER HANS
IPC: C09B47/06
CPC classification number: C09B47/06
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