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公开(公告)号：US2443257A
公开(公告)日：1948-06-15
申请号：US59400545
申请日：1945-05-16
Applicant: LEACH JOHN M
Inventor： PAUL LEO
IPC: B23B51/10
CPC classification number: B23B51/107 , Y10T408/88 , Y10T408/892
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