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公开(公告)号：US2878138A
公开(公告)日：1959-03-17
申请号：US61210256
申请日：1956-09-26
Applicant: BAYER AG
Inventor： RODERICH RAUE , WERNER MULLER , OTTO WEBER , VOLKMAR WEBER
IPC: D06L3/12
CPC classification number: D06L4/636
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