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发明名称
Thermionic tube
摘要
申请公布号
US1917703(A)
申请公布日期
1933.07.11
申请号
US19300431876
申请日期
1930.02.27
申请人
THE FIRM C. H. F. MULLER AKTIENGESELLSCHAFT
发明人
DAUMANN KARL WILHELM
分类号
H01J19/34
主分类号
H01J19/34
代理机构
代理人
主权项
地址
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