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发明名称
ELEKTRONENROEHRE MIT ABSCHIRMKAEFIG.
摘要
申请公布号
DE1634398(U)
申请公布日期
1952.02.07
申请号
DE195100P1869U
申请日期
1951.04.14
申请人
PHILIPS PATENTVERWALTUNG G.M.B.H.
发明人
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