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公开(公告)号：US1401980A
公开(公告)日：1922-01-03
申请号：US43493421
申请日：1921-01-04
Applicant: EASTERN MFG COMPANY
Inventor： HANSON HUGO H , HODGDON PAUL E
IPC: B26F1/40
CPC classification number: B26F1/40
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