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发明名称
Improvements in or relating to the manufacture of grids for use in electron discharge devices
摘要
申请公布号
GB600257(A)
申请公布日期
1948.04.05
申请号
GB19440025829
申请日期
1944.12.21
申请人
HERBERT EDWARD HOLMAN
发明人
分类号
H01J19/00
主分类号
H01J19/00
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代理人
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