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1.发明授权
公开(公告)号：US2780606A
公开(公告)日：1957-02-05
申请号：US24316451
申请日：1951-08-22
Applicant: BAYER AG
Inventor： PETER HOPPE , HANS PFEFFER , ERWIN MULLER
IPC: C08J9/06
CPC classification number: C08J9/06
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