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发明名称
Improvements in or relating to the manufacture of electron discharge devices
摘要
申请公布号
GB657027(A)
申请公布日期
1951.09.05
申请号
GB19480003584
申请日期
1948.02.06
申请人
HIS MAJESTY'S POSTMASTER GENERAL
发明人
METSON GILBERT HAROLD
分类号
H01J9/38
主分类号
H01J9/38
代理机构
代理人
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