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公开(公告)号：US3495145A
公开(公告)日：1970-02-10
申请号：US3495145D
申请日：1967-10-11
Applicant: IBM
Inventor： SORDELLO FRANK J , WILFORD CHARLES R
CPC classification number: G11B5/5521 , G05D3/1418 , G05D3/20
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