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发明名称
Perfectionnements aux cristaux piézoélectriques
摘要
申请公布号
FR1018829(A)
申请公布日期
1953.01.13
申请号
FRD1018829
申请日期
1950.03.28
申请人
发明人
BECHMANN RUDOLF
分类号
H03H9/02;H03H9/17
主分类号
H03H9/02
代理机构
代理人
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