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经营范围
发明名称
Improvements in and relating to thermionic valve circuits
摘要
申请公布号
GB510301(A)
申请公布日期
1939.07.31
申请号
GB19380028008
申请日期
1938.02.02
申请人
PYE LIMITED;MAX VICTOR CALLENDAR
发明人
分类号
H03G7/02
主分类号
H03G7/02
代理机构
代理人
主权项
地址
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