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公开(公告)号：US2181288A
公开(公告)日：1939-11-28
申请号：US10764736
申请日：1936-10-26
Applicant: RAYTHEON PRODUCTION CORP
Inventor： WASHBURN HENRY M
IPC: H01J19/00
CPC classification number: H01J19/00 , H01J2893/0026 , Y10T29/5187
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