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公开(公告)号：US3180842A
公开(公告)日：1965-04-27
申请号：US15325461
申请日：1961-11-15
Applicant: NAT RES DEV
Inventor： NEVILLE HASZELDINE ROBERT , ERIC BANKS RONALD , THAIN FLOWERS WILLIAM
IPC: C08G73/00
CPC classification number: C08G73/00
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