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发明名称
Indirekt geheizte Glühkathode für Entladungsröhren.
摘要
申请公布号
AT157571(B)
申请公布日期
1939.12.11
申请号
ATD157571
申请日期
1931.01.10
申请人
DR. ERICH F. HUTH G. M. B. H.
发明人
分类号
主分类号
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代理人
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