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发明名称
THERMIONIC CATHODE
摘要
申请公布号
GB2050045(A)
申请公布日期
1980.12.31
申请号
GB19790018610
申请日期
1979.05.29
申请人
EMI-VARIAN LTD
发明人
分类号
H01J1/14;H01J9/04;(IPC1-7):H01J1/13
主分类号
H01J1/14
代理机构
代理人
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