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1.发明授权
公开(公告)号：US2887470A
公开(公告)日：1959-05-19
申请号：US47042254
申请日：1954-11-22
Applicant: SNIA VISCOSA
Inventor： WERNER MUENCH , ENRICO CROSIO
IPC: C08G69/46
CPC classification number: C08G69/46
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