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公开(公告)号：US3307508A
公开(公告)日：1967-03-07
申请号：US45765265
申请日：1965-05-21
Applicant: INT HARVESTER CO
Inventor： RUSSELL CARL D
CPC classification number: A01C7/201 , A01B61/044 , A01C7/08 , A01C21/002
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