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经营范围
发明名称
COUPLING FOR THERMIONIC VALVES
摘要
申请公布号
CA301941(A)
申请公布日期
1930.07.08
申请号
CAD301941
申请日期
申请人
LA SOCIETE FRANCAIS RADIO ELECTRIQUE
发明人
PAUL BORIAS
分类号
主分类号
代理机构
代理人
主权项
地址
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