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公开(公告)号：US3498837A
公开(公告)日：1970-03-03
申请号：US3498837D
申请日：1967-01-11
Applicant: IBM
Inventor： ALSTAD JOHN K , BATE GEOFFREY , MILLER RICHARD C , MORRISON JOHN R , SPELIOTIS DENNIS E
CPC classification number: G11B5/72 , C23C14/0021 , Y10S428/90 , Y10T428/31678
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