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经营范围
发明名称
Perfectionnements aux dispositifs démultiplicateurs de fréquence basses
摘要
申请公布号
FR988572(A)
申请公布日期
1951.08.29
申请号
FRD988572
申请日期
1944.01.11
申请人
发明人
PELLE PIERRE
分类号
H04M19/02
主分类号
H04M19/02
代理机构
代理人
主权项
地址
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