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公开(公告)号：US2888593A
公开(公告)日：1959-05-26
申请号：US62842056
申请日：1956-12-14
Applicant: WESTINGHOUSE ELECTRIC CORP
Inventor： ANDERSON ARTHUR E , SACK JR EDGAR A
IPC: H01J31/18
CPC classification number: H01J31/18
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