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发明名称
SWITCHING DEVICE FOR CONFERENCE COMMUNICATION
摘要
申请公布号
SU756634(A1)
申请公布日期
1980.08.15
申请号
SU19782687350
申请日期
1978.11.21
申请人
RIZHSKIJ POLT INSTITUT
发明人
KOTOVICH GLEB N,SU
分类号
H03K17/00;H04M3/56;(IPC1-7):H03K17/00
主分类号
H03K17/00
代理机构
代理人
主权项
地址
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