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公开(公告)号：US2745983A
公开(公告)日：1956-05-15
申请号：US16412850
申请日：1950-05-25
Applicant: CSF
Inventor： OSCAR DOHLER , HARRY HUBER , WERNER KLEEN
IPC: H01J25/44
CPC classification number: H01J25/44
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