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公开(公告)号：US2478231A
公开(公告)日：1949-08-09
申请号：US62712945
申请日：1945-11-07
Applicant: THOMPSON PROD INC
Inventor： BOWERS ELIZABETH M
IPC: B23B31/16
CPC classification number: B23B31/1627 , Y10T29/49279
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