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发明名称
Improvements in or relating to electron emitters for electron discharge devices
摘要
申请公布号
GB440094(A)
申请公布日期
1935.12.19
申请号
GB19350021386
申请日期
1935.07.27
申请人
STANDARD TELEPHONES AND CABLES LIMITED
发明人
分类号
H01J1/20
主分类号
H01J1/20
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代理人
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