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发明名称
Perfectionnements aux appareils acoustiques à magnétostriction
摘要
申请公布号
FR856033(A)
申请公布日期
1940.05.25
申请号
FRD856033
申请日期
1939.02.11
申请人
ATELIERS J. CARPENTIER
发明人
分类号
H03H9/22
主分类号
H03H9/22
代理机构
代理人
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