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公开(公告)号：US2833474A
公开(公告)日：1958-05-06
申请号：US48141655
申请日：1955-01-12
Applicant: IBM
Inventor： WILSON EDWARD S , O'HARA REGINALD A
IPC: G06K13/067
CPC classification number: G06K13/067
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