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发明名称
Elektrische Entladungsröhre.
摘要
申请公布号
AT158926(B)
申请公布日期
1940.06.10
申请号
ATD158926
申请日期
1938.04.14
申请人
RADIO CORPORATION OF AMERICA
发明人
分类号
主分类号
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代理人
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