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发明名称
ELECTRON DISCHARGE TUBES
摘要
申请公布号
GB1493065(A)
申请公布日期
1977.11.23
申请号
GB19750007984
申请日期
1975.02.26
申请人
SIEMENS AG
发明人
分类号
H01J23/027;H01J23/033;(IPC1-7):H01J23/03
主分类号
H01J23/027
代理机构
代理人
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地址
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