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1.发明授权
公开(公告)号：US3392324A
公开(公告)日：1968-07-09
申请号：US51733365
申请日：1965-12-29
Applicant: IBM
Inventor： KARL HERMANN , WRENNER WARREN R
CPC classification number: G01R31/2841 , G01R31/041 , G01R31/2806 , H02P7/2805
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