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公开(公告)号：US3242470A
公开(公告)日：1966-03-22
申请号：US21827162
申请日：1962-08-21
Applicant: BELL TELEPHONE LABOR INC
Inventor： HAGELBARGER DAVID W , HALL WILLIAM G , MALTHANCR WILLIAM A
IPC: G06F17/30
CPC classification number: G06F17/30955 , Y10S707/99931
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