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经营范围
发明名称
DUPLICATE SYSTEM FOR TRUNK INTERFACE CIRCUIT
摘要
申请公布号
JPH05167681(A)
申请公布日期
1993.07.02
申请号
JP19910330985
申请日期
1991.12.16
申请人
NEC CORP
发明人
TACHIKAWA MOTOYA
分类号
H04M3/22;H04Q3/42;H04Q3/545
主分类号
H04M3/22
代理机构
代理人
主权项
地址
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