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发明名称
Improvements in and relating to discharge tubes with indirectly heated cathodes
摘要
申请公布号
GB409583(A)
申请公布日期
1934.05.03
申请号
GB19330027602
申请日期
1933.10.06
申请人
ELEKTRISCHE GLUEHLAMPENFABRIKEN JOH. KREMENEZKY A.G.
发明人
分类号
H01J19/42
主分类号
H01J19/42
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代理人
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