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发明名称
INDIRECTLY HEATED CATHODE
摘要
申请公布号
CA565688(A)
申请公布日期
1958.11.04
申请号
CAD565688
申请日期
申请人
N.V. PHILIPS GLOEILAMPENFABRIEKEN
发明人
HENDRIKUS J. M. VAN TOL
分类号
主分类号
代理机构
代理人
主权项
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