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公开(公告)号：US2474675A
公开(公告)日：1949-06-28
申请号：US56495944
申请日：1944-11-24
Applicant: VLADIMIR JANKOWSKI
Inventor： VLADIMIR JANKOWSKI
IPC: B23Q16/06
CPC classification number: B23Q16/06 , Y10T74/1465 , Y10T74/1476 , Y10T82/2587
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