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发明名称
ARRANGEMENT FOR CHECKING LONG-RANGE COMMUNICATION CHANNEL
摘要
申请公布号
SU660284(A2)
申请公布日期
1979.04.30
申请号
SU19772460189
申请日期
1977.03.09
申请人
KOPTEV VLADIMIR P,SU
发明人
KOPTEV VLADIMIR P,SU
分类号
H04J3/14;(IPC1-7):H04J3/14
主分类号
H04J3/14
代理机构
代理人
主权项
地址
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