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公开(公告)号：US2161824A
公开(公告)日：1939-06-13
申请号：US12750037
申请日：1937-02-24
Applicant: GEN ELECTRIC
Inventor： HERMANN KREFFT , WALTER HANLEIN , MARTIN WAGNER
CPC classification number: C03C27/02 , C03C3/064 , C03C4/12 , C03C4/20 , H01J61/302
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