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公开(公告)号：US1630415A
公开(公告)日：1927-05-31
申请号：US2860725
申请日：1925-05-07
Applicant: BLUME EDWARD E , CARL ANDERSON
Inventor： BLUME EDWARD E , CARL ANDERSON
IPC: A01B39/26
CPC classification number: A01B39/26
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