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发明名称
Dispositifs de support d'éléments piezo-électriques vibrants et systèmes électriques les utilisant
摘要
申请公布号
FR840098(A)
申请公布日期
1939.04.18
申请号
FRD840098
申请日期
1937.12.24
申请人
LE MATERIEL TELEPHONIQUE
发明人
分类号
H03H9/05
主分类号
H03H9/05
代理机构
代理人
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地址
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