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发明名称
Perfectionnements aux substances piezo-électriques et aux procédés de production de celles-ci
摘要
申请公布号
FR858610(A)
申请公布日期
1940.11.29
申请号
FRD858610
申请日期
1939.08.03
申请人
ELECTRICAL RESEARCH PRODUCTS INC.
发明人
分类号
H01L41/18
主分类号
H01L41/18
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代理人
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