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公开(公告)号：US2135719A
公开(公告)日：1938-11-08
申请号：US20231038
申请日：1938-04-15
Applicant: GEN ELECTRIC
Inventor： HERMANN KREFFT , WILLY WILDE , KURT LARCHE
IPC: H01J61/96
CPC classification number: H01J61/96
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