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发明名称
Procédé de reproduction et de transmission utilisant une source d'ondes ultra-sonores
摘要
申请公布号
FR927934(A)
申请公布日期
1947.11.13
申请号
FRD927934
申请日期
1946.04.24
申请人
发明人
MORICE MARCEL
分类号
G11B9/00
主分类号
G11B9/00
代理机构
代理人
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地址
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