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公开(公告)号：US2376040A
公开(公告)日：1945-05-15
申请号：US51518643
申请日：1943-12-21
Applicant: ELTELMCCUILOUGH INC
Inventor： EITEL WILLIAM W , MCCULLOUGH JACK A
IPC: H01J19/28
CPC classification number: H01J19/28 , H01J2893/0013
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