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发明名称
Dispositif à décharge électronique
摘要
申请公布号
FR55359(E)
申请公布日期
1952.06.27
申请号
FRD55359
申请日期
1940.05.11
申请人
LE MATERIEL TELEPHONIQUE
发明人
分类号
H01J25/12
主分类号
H01J25/12
代理机构
代理人
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