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公开(公告)号：US2816886A
公开(公告)日：1957-12-17
申请号：US52310855
申请日：1955-07-19
Applicant: HOECHST AG
Inventor： ERICH BRENNEISEN , RICHARD HUHS , ARTHUR SIEBERT
IPC: C09B31/14
CPC classification number: C09B31/14
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