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发明名称
Improvements in or relating to crossed-wire grids for thermionic valves
摘要
申请公布号
GB888035(A)
申请公布日期
1962.01.24
申请号
GB19590035083
申请日期
1959.10.16
申请人
SIEMENS & HALSKE AKTIENGESELLSCHAFT
发明人
分类号
H01J19/30
主分类号
H01J19/30
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代理人
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