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经营范围
发明名称
Improvements in or relating to electron beam tubes
摘要
申请公布号
GB922821(A)
申请公布日期
1963.04.03
申请号
GB19610015452
申请日期
1961.04.28
申请人
SIEMENS & HALSKE AKTIENGESELLSCHAFT
发明人
分类号
H01J25/49
主分类号
H01J25/49
代理机构
代理人
主权项
地址
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