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公开(公告)号：US2576076A
公开(公告)日：1951-11-20
申请号：US3706448
申请日：1948-07-03
Applicant: SHELL DEV
Inventor： MARGUERITE NAPS , CONDE FRED E
IPC: C08F20/50
CPC classification number: C08F20/50
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