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公开(公告)号：US2451847A
公开(公告)日：1948-10-19
申请号：US48151643
申请日：1943-04-02
Applicant: WESTINGHOUSE ELECTRIC CORP
Inventor： TRUST COMPANY FIDELITY UNION , GREENBOWE JAMES W
IPC: H01J5/32
CPC classification number: H01J5/32
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