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发明名称
Tube à vide triode
摘要
申请公布号
FR921874(A)
申请公布日期
1947.05.21
申请号
FRD921874
申请日期
1945.12.07
申请人
LE MATERIEL TELEPHONIQUE
发明人
BECQUEMONT JACQUES
分类号
H01J21/06
主分类号
H01J21/06
代理机构
代理人
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