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发明名称
Frekvensomførmende Elektronrørsrelais.
摘要
申请公布号
DK44226(C)
申请公布日期
1931.06.15
申请号
DKD44226
申请日期
1929.09.30
申请人
TELEFONAKTIEBOLAGET L. M. ERICSSON
发明人
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主分类号
代理机构
代理人
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