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发明名称
Appareils à décharge électronique
摘要
申请公布号
FR829267(A)
申请公布日期
1938.06.17
申请号
FRD829267
申请日期
1937.10.22
申请人
LE MATERIEL TELEPHONIQUE
发明人
分类号
H01J21/04;H01J25/70;H01J25/74;H03B9/01;H03C7/02
主分类号
H01J21/04
代理机构
代理人
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