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公开(公告)号：US988104A
公开(公告)日：1911-03-28
申请号：US1910568805
申请日：1910-06-25
Applicant: GEN ELECTRIC
Inventor： JENCKES RAY G
CPC classification number: H01J5/08 , G09F9/33 , Y10S40/902
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