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发明名称
DIREKT GEHEIZTE KATHODE FUER ELEKTRONENROEHREN
摘要
申请公布号
DE1813991(B2)
申请公布日期
1977.08.04
申请号
DE19681813991
申请日期
1968.12.11
申请人
发明人
分类号
H01J1/15;(IPC1-7):H01J19/08
主分类号
H01J1/15
代理机构
代理人
主权项
地址
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