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公开(公告)号：US3249728A
公开(公告)日：1966-05-03
申请号：US29806463
申请日：1963-07-29
Applicant: NIPPON ELECTRIC CO
Inventor： TAKESHI SASAMOTO , YOSHITAMI OHKI
CPC classification number: B32B15/018 , C23C26/00 , H01F1/00 , H01H1/0201 , Y10T29/49105
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