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公开(公告)号：US3177328A
公开(公告)日：1965-04-06
申请号：US4419560
申请日：1960-07-20
Applicant: SIEMENS AG
Inventor： LOTHAR BORCHERT , CHRISTIAN HUBER , KARL-LUDWIG RAU
CPC classification number: H01J17/38 , H01H1/02 , H01H1/0201 , H01H1/66 , H01H2001/0208 , H01J2893/0065
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