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发明名称
Reproducteur électromagnétique réversible, permettant de transformer des vibrations en courants électriques variés et réciproquement
摘要
申请公布号
FR677081(A)
申请公布日期
1930.03.03
申请号
FRD677081
申请日期
1929.06.10
申请人
发明人
SIMON GEORGES-LEON
分类号
H04R11/08
主分类号
H04R11/08
代理机构
代理人
主权项
地址
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