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发明名称
Improvements in or relating to electron discharge apparatus
摘要
申请公布号
GB668168(A)
申请公布日期
1952.03.12
申请号
GB19480015151
申请日期
1948.06.04
申请人
STANDARD TELEPHONES AND CABLES LIMITED
发明人
分类号
H01J25/38
主分类号
H01J25/38
代理机构
代理人
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