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公开(公告)号:US2994074A
公开(公告)日:1961-07-25
申请号:US70616757
申请日:1957-12-30
Applicant: IBM
Inventor: DURAND ROBERT D , DRISCOLL ROBERT G , COBB RICHARD O
公开(公告)号:US2994074A
公开(公告)日:1961-07-25
申请号:US70616757
申请日:1957-12-30
Applicant: IBM
Inventor: DURAND ROBERT D , DRISCOLL ROBERT G , COBB RICHARD O