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发明名称
Electron discharge device
摘要
申请公布号
US2075208(A)
申请公布日期
1937.03.30
申请号
US19350032200
申请日期
1935.07.19
申请人
SIEMENS & HALSKE AKTIENGESELLSCHAFT
发明人
KRENZIEN OTTO
分类号
H01J17/52
主分类号
H01J17/52
代理机构
代理人
主权项
地址
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