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发明名称
Improvements in or relating to thermionic valve apparatus
摘要
申请公布号
GB404029(A)
申请公布日期
1934.01.08
申请号
GB19320019384
申请日期
1932.07.08
申请人
HARRY ALEXANDER EWEN
发明人
分类号
H04B1/02
主分类号
H04B1/02
代理机构
代理人
主权项
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