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发明名称
CIRCUITO CONFERENZA A PIU' INGRESSI PARTICOLARMENTE PER L'IMPIEGO IN UNA CENTRALE TELEFONICA PRIVATA.
摘要
申请公布号
IT7830422(D0)
申请公布日期
1978.12.01
申请号
IT19780030422
申请日期
1978.12.01
申请人
GTE AUTOMATIC ELECTRIC LABORATORIES INCORPORATED
发明人
分类号
H04M3/56;(IPC1-7):H04M/
主分类号
H04M3/56
代理机构
代理人
主权项
地址
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