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发明名称
Cristaux piezoélectriques
摘要
申请公布号
FR693126(A)
申请公布日期
1930.11.17
申请号
FRD693126
申请日期
1930.04.01
申请人
ELECTRICAL RESEARCH PRODUCTS INC.
发明人
分类号
H03H3/04;H03H9/19
主分类号
H03H3/04
代理机构
代理人
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