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发明名称
Circuits pour valves thermoioniques
摘要
申请公布号
FR823344(A)
申请公布日期
1938.01.18
申请号
FRD823344
申请日期
1937.06.21
申请人
LE MATERIEL TELEPHONIQUE, SOCIETE ANONYME
发明人
分类号
H01J21/02
主分类号
H01J21/02
代理机构
代理人
主权项
地址
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