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发明名称
Dispositif pour exciter des oscillations piezoelectriques dans des cristaux
摘要
申请公布号
FR692017(A)
申请公布日期
1930.10.29
申请号
FRD692017
申请日期
1930.03.15
申请人
发明人
分类号
H03H9/13
主分类号
H03H9/13
代理机构
代理人
主权项
地址
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