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公开(公告)号：US2827390A
公开(公告)日：1958-03-18
申请号：US48802955
申请日：1955-02-14
Applicant: THOMAS ELECTRONICS INC
Inventor： GARRIGUS RICHARD H
IPC: H01J9/227
CPC classification number: H01J9/2274 , H01J9/2271
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