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公开(公告)号：US2473320A
公开(公告)日：1949-06-14
申请号：US73315347
申请日：1947-03-07
Applicant: COSSOR LTD A C
Inventor： ASHFORD WYNN ARTHUR HENRY , ALFRED HILL RONALD
CPC classification number: H01J29/894 , H01J29/24 , Y10S315/01
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