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公开(公告)号：US2574012A
公开(公告)日：1951-11-06
申请号：US74562847
申请日：1947-05-02
Applicant: CSF
Inventor： ROBERT BONNE , PIERRE CAHOUR , PIERRE GRIVET
IPC: H01J25/10
CPC classification number: H01J25/10
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