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发明名称
THERMIONIC ELECTRODE
摘要
申请公布号
CA881084(A)
申请公布日期
1971.09.14
申请号
CAD881084
申请日期
申请人
N.V. PHILIPS GLOEILAMPENFABRIEKEN
发明人
FRIEDRICH H. R. ALMER
分类号
主分类号
代理机构
代理人
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