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发明名称
Perfectionnements aux électrodes pour tubes à vide et tubes à atmosphère gazeuse
摘要
申请公布号
FR729493(A)
申请公布日期
1932.07.25
申请号
FRD729493
申请日期
1931.03.17
申请人
L. PAQUET ET COMPAGNIE
发明人
分类号
H01J17/06
主分类号
H01J17/06
代理机构
代理人
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