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公开(公告)号：US3166880A
公开(公告)日：1965-01-26
申请号：US26963263
申请日：1963-04-01
Applicant: CLEMAR COMPANY
Inventor： ROBINSON MAURICE E
IPC: A01D34/66
CPC classification number: A01D34/661 , Y10S56/10
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