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公开(公告)号：US3420683A
公开(公告)日：1969-01-07
申请号：US3420683D
申请日：1963-12-11
Applicant: NIPPON ELECTRIC CO
Inventor： IKEDA KOICHI , TSUJI SHIGERU , ANAZAWA SHINZO , KOYAMA TSUKASA
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