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公开(公告)号：US2994065A
公开(公告)日：1961-07-25
申请号：US57156656
申请日：1956-03-14
Applicant: IBM
Inventor： THOMAS LLEWELYN H , TONER JAMES W
IPC: G06F7/24
CPC classification number: G06F7/24 , Y10S707/99937
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