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公开(公告)号：US2466719A
公开(公告)日：1949-04-12
申请号：US71246346
申请日：1946-11-26
Applicant: MACKEARNIN JAMES C
Inventor： MACKEARNIN JAMES C
CPC classification number: D06F75/34 , D06F79/00 , Y10S16/12 , Y10T74/20828
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