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经营范围
发明名称
Improvements in or relating to periodic permanent magnetic focusing systems for electron beam discharge tubes
摘要
申请公布号
GB951851(A)
申请公布日期
1964.03.11
申请号
GB19620013563
申请日期
1962.04.09
申请人
TELEFUNKEN PATENTSVERWERTUNGS G.M.B.H.
发明人
分类号
H01J23/087
主分类号
H01J23/087
代理机构
代理人
主权项
地址
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