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公开(公告)号：US3118870A
公开(公告)日：1964-01-21
申请号：US18080162
申请日：1962-03-19
Applicant: HOECHST AG
Inventor： ERICH DIETZ , GUNTHER SEMLER , ARTHUR SIEBERT
IPC: C09B29/20
CPC classification number: C09B29/20
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