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发明名称
Selbstaufheizkathode
摘要
申请公布号
DE669029(C)
申请公布日期
1938.12.15
申请号
DE1934S114542D
申请日期
1934.06.29
申请人
SIEMENS-SCHUCKERTWERKE AKT.-GES.
发明人
ESPE DR. WERNER
分类号
H01J1/28
主分类号
H01J1/28
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