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公开(公告)号：NO773305A
公开(公告)日：1978-03-31
申请号：NO773305
申请日：1977-09-27
Applicant: IBM
Inventor： HATCHETT MICHAEL ROBERT , RIGBEY LEONARD JOHN
IPC: G11B23/033 , G11B17/32 , G11B25/04 , G11B
CPC classification number: G11B17/32
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