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发明名称
摘要
申请公布号
FR962868(A)
申请公布日期
1950.06.22
申请号
FRD962868
申请日期
申请人
发明人
分类号
H01J19/80;H01P5/04;H01P7/06;H03C7/02;H03D1/08;H03F3/54
主分类号
H01J19/80
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代理人
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地址
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