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发明名称
Improvements in or relating to thermionic valve circuits
摘要
申请公布号
GB573348(A)
申请公布日期
1945.11.16
申请号
GB19430018359
申请日期
1943.11.05
申请人
BERTRAM MORTON HADFIELD
发明人
分类号
H03F1/04
主分类号
H03F1/04
代理机构
代理人
主权项
地址
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