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发明名称
Tubes à décharge électrique
摘要
申请公布号
FR838493(A)
申请公布日期
1939.03.07
申请号
FRD838493
申请日期
1938.05.27
申请人
HYGRADE SYLVANIA CORPORATION
发明人
分类号
H01J5/12;H01J5/48;H01J5/54;H01J19/02;H01J19/66
主分类号
H01J5/12
代理机构
代理人
主权项
地址
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