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公开(公告)号：US3394974A
公开(公告)日：1968-07-30
申请号：US59418366
申请日：1966-11-14
Applicant: TOKYO SHIBAURA ELECTRIC CO
Inventor： SHOICHI MIYASHIRO , KATSUYUKI INOUE
CPC classification number: H01J9/125 , H01J31/506 , H01J2201/32
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