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公开(公告)号：US2504842A
公开(公告)日：1950-04-18
申请号：US48207843
申请日：1943-04-07
Applicant: WESTERN ELECTRIC CO
Inventor： JUVINALL JAMES W , SNORCK STANLEY J
IPC: H01J9/32
CPC classification number: H01J9/32
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