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经营范围
发明名称
Système oscillateur à tube électronique
摘要
申请公布号
FR728854(A)
申请公布日期
1932.07.12
申请号
FRD728854
申请日期
1931.12.26
申请人
WIRED RADIO INC.
发明人
分类号
H03B5/34
主分类号
H03B5/34
代理机构
代理人
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