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发明名称
MEDIOS PARA EL MANDO DEL SENTIDO DE LA CONVERSACIoN EN APARATOS DE CONMUTACIoN EN ALTA VOZ
摘要
申请公布号
ES234808(A3)
申请公布日期
1957.06.01
申请号
ES19080002348
申请日期
1957.04.11
申请人
DUCATI ELECTROTECNICA, SOCIETR PER AZIONI
发明人
分类号
(IPC1-7):G10;H04
主分类号
(IPC1-7):G10
代理机构
代理人
主权项
地址
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