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发明名称
Improvements in or relating to electron discharge devices
摘要
申请公布号
GB586352(A)
申请公布日期
1947.03.17
申请号
GB19440002276
申请日期
1944.02.07
申请人
STANDARD TELEPHONES AND CABLES LIMITED;CHARLES NORMAN SMYTH
发明人
分类号
H01J21/20
主分类号
H01J21/20
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