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发明名称
Amplificateur thermoionique
摘要
申请公布号
FR709513(A)
申请公布日期
1931.08.07
申请号
FRD709513
申请日期
1931.01.15
申请人
N. V. PHILIPS' GLOEILAMPENFABRIEKEN
发明人
分类号
H03F1/36;H03F1/40
主分类号
H03F1/36
代理机构
代理人
主权项
地址
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