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公开(公告)号：US3492158A
公开(公告)日：1970-01-27
申请号：US3492158D
申请日：1965-12-30
Applicant: IBM
Inventor： SCOW KENNETH B , ANDERSON JOSEPH P , BERTELSEN BRUCE I
CPC classification number: H01F41/22 , Y10S428/90
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