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经营范围
发明名称
Perfectionnements aux reproducteurs magnétiques de son
摘要
申请公布号
FR1052291(A)
申请公布日期
1954.01.22
申请号
FRD1052291
申请日期
1952.03.11
申请人
发明人
MARCKX FELIX
分类号
G11B15/70
主分类号
G11B15/70
代理机构
代理人
主权项
地址
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