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公开(公告)号：US2561185A
公开(公告)日：1951-07-17
申请号：US14129450
申请日：1950-01-30
Applicant: VICTOR DRAKE ROBERT
Inventor： VICTOR DRAKE ROBERT
CPC classification number: B23B31/008 , B23B51/0406 , B23B2222/48 , Y10T408/895
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