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公开(公告)号：US3367519A
公开(公告)日：1968-02-06
申请号：US53609366
申请日：1966-03-21
Applicant: STARLINE
Inventor： FERRIS ROBERT G , LAIDIG JONATHAN J
IPC: A01F25/20
CPC classification number: A01F25/2018
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