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发明名称
THERMIONIC VALVE
摘要
申请公布号
CA404668(A)
申请公布日期
1942.05.12
申请号
CAD404668
申请日期
申请人
CANADIAN MARCONI COMPANY
发明人
GEORGE FAIRBURN BRETT;NOEL MEYER RUST
分类号
主分类号
代理机构
代理人
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