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发明名称
THERMIONIC DEVICE CATHODE
摘要
申请公布号
CA340918(A)
申请公布日期
1934.04.17
申请号
CAD340918
申请日期
申请人
THE CANADIAN GENERAL ELECTRIC COMPANY
发明人
OTIS W. PIKE
分类号
主分类号
代理机构
代理人
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