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公开(公告)号：US2780562A
公开(公告)日：1957-02-05
申请号：US25376251
申请日：1951-10-29
Applicant: BAYER AG
Inventor： KURT REINARTZ , WILHELM GRAULICH , WOLFGANG LEHMANN , HELMUT KLEINER
IPC: D06P1/44
CPC classification number: D06P1/44
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