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公开(公告)号：US2674836A
公开(公告)日：1954-04-13
申请号：US10377349
申请日：1949-07-09
Applicant: NOBLE MFG COMPANY
Inventor： SCHULTE JOHN A
CPC classification number: A01B23/043 , A01B23/02 , A01B73/044
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