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发明名称
Means for heating cathodes of space discharge devices
摘要
申请公布号
US1888360(A)
申请公布日期
1932.11.22
申请号
US19300436688
申请日期
1930.03.18
申请人
RADIO CORPORATION
发明人
ROBERTS WALTER VAN B.
分类号
H02M7/08
主分类号
H02M7/08
代理机构
代理人
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地址
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