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公开(公告)号：US3229985A
公开(公告)日：1966-01-18
申请号：US41928064
申请日：1964-12-11
Applicant: STARLINE
Inventor： YUENGER ETHEL E , FERRIS HOWARD J , FERRIS ROBERT G
IPC: A01C3/06
CPC classification number: A01C3/063
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