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发明名称
Thermionic valve element assembly
摘要
申请公布号
US2503806(A)
申请公布日期
1950.04.11
申请号
US19470735444
申请日期
1947.03.18
申请人
HIVAC LIMITED
发明人
DIGGLE HARRY
分类号
H01J21/36
主分类号
H01J21/36
代理机构
代理人
主权项
地址
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