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公开(公告)号：US2752340A
公开(公告)日：1956-06-26
申请号：US33602253
申请日：1953-02-09
Applicant: HOECHST AG
Inventor： GUSTAV EHRHART , HEINRICH RUSCHIG , JOSEPF SCHMIDT-THOME , WERNER HAEDE , WERNER FRITSCH
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