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公开(公告)号：US3548177A
公开(公告)日：1970-12-15
申请号：US3548177D
申请日：1968-01-18
Applicant: IBM
Inventor： HARTLIPP WILLIS E , HEALY HENRY G , RUGGIERO ANGELO S , SHUTLER WILLIAM F
CPC classification number: G06F11/00
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