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1.发明授权
公开(公告)号：US3352945A
公开(公告)日：1967-11-14
申请号：US40654064
申请日：1964-10-26
Applicant: SNIA VISCOSA
Inventor： ATTILIO PALVARINI , EDGARDO HORAK , FRANCO MILIZIA
IPC: C08G2/38
CPC classification number: C08G2/38 , Y10S525/938
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