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发明名称
Nouveau procédé de transmission microphonique de la parole et coiffures adaptées à ce procédé
摘要
申请公布号
FR1249517(A)
申请公布日期
1960.12.30
申请号
FR19590810676
申请日期
1959.11.19
申请人
CHARBONNAGES DE FRANCE
发明人
分类号
H04R1/46
主分类号
H04R1/46
代理机构
代理人
主权项
地址
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