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经营范围
发明名称
Improvements in and relating to grids for electron discharge devices
摘要
申请公布号
GB624731(A)
申请公布日期
1949.06.15
申请号
GB19460037045
申请日期
1946.12.16
申请人
THE BRITISH THOMSON-HOUSTON COMPANY, LIMITED
发明人
分类号
H01J19/38
主分类号
H01J19/38
代理机构
代理人
主权项
地址
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