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公开(公告)号：US2906904A
公开(公告)日：1959-09-29
申请号：US57862456
申请日：1956-04-17
Applicant: WESTINGHOUSE ELECTRIC CORP
Inventor： WOUGHTER EARL R , KNOCHEL WILLIAM J
CPC classification number: H01J29/24 , H01J29/073 , H01J2229/0772
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