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发明名称
Perfectionnements aux dispositifs à décharge électrionique
摘要
申请公布号
FR697050(A)
申请公布日期
1931.01.10
申请号
FRD697050
申请日期
1930.06.02
申请人
LE MATERIEL TELEPHONIQUE
发明人
分类号
H01J21/02
主分类号
H01J21/02
代理机构
代理人
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