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公开(公告)号：US2809313A
公开(公告)日：1957-10-08
申请号：US38096453
申请日：1953-09-18
Applicant: WESTINGHOUSE ELECTRIC CORP
Inventor： WILLIAM BAER , BAYARD ROBERT T , SWIFT OLIVER F
IPC: H01J47/12
CPC classification number: H01J47/12
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