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经营范围
发明名称
Travelling wave tubes
摘要
申请公布号
GB9426050(D0)
申请公布日期
1995.02.22
申请号
GB19940026050
申请日期
1994.12.19
申请人
EEV LIMITED
发明人
分类号
H01J23/30
主分类号
H01J23/30
代理机构
代理人
主权项
地址
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