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公开(公告)号：US1859348A
公开(公告)日：1932-05-24
申请号：US46055530
申请日：1930-06-12
Applicant: DALTON FOUNDRIES INC
Inventor： FRANK SWIHART
IPC: B25B27/02
CPC classification number: B25B27/023 , Y10T29/5387
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