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公开(公告)号：US3596716A
公开(公告)日：1971-08-03
申请号：US3596716D
申请日：1968-05-27
申请人： LOCKWOOD CORP
发明人： HOFFMAN CARL C
CPC分类号： A01D33/04
摘要： Conventional digger chains delivering directly into the intake of a vacuum chamber and directly onto a potato removal conveyor over adjustable flexible flaps which individually flex downwardly to discharge rocks from the potato stream and flex upwardly to control the air stream.
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