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公开(公告)号:US2898514A
公开(公告)日:1959-08-04
申请号:US57118356
申请日:1956-03-13
Applicant: IBM
Inventor: O'DONNELL JOHN F , DONALD SEGALL
公开(公告)号:US2898514A
公开(公告)日:1959-08-04
申请号:US57118356
申请日:1956-03-13
Applicant: IBM
Inventor: O'DONNELL JOHN F , DONALD SEGALL