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公开(公告)号：US3409882A
公开(公告)日：1968-11-05
申请号：US51731165
申请日：1965-12-29
Applicant: IBM
Inventor： SWEET JAMES R , STEVENS LOUIS D , HILDEBRAND JACK O
IPC: G06F17/30
CPC classification number: G06F17/30952 , Y10S707/99931
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