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经营范围
发明名称
Elektronenroehre mit einer kaefigfoermigen Elektrode
摘要
申请公布号
DE749164(C)
申请公布日期
1945.01.16
申请号
DED749164D
申请日期
1939.07.01
申请人
发明人
HESS KURT;RAHN ERNST
分类号
H01J19/28
主分类号
H01J19/28
代理机构
代理人
主权项
地址
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