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发明名称
DIRECT TRUNK SWITCHING DEVICE
摘要
申请公布号
JPS6444696(A)
申请公布日期
1989.02.17
申请号
JP19870202381
申请日期
1987.08.13
申请人
TOSHIBA CORP
发明人
OKA TSUNEAKI
分类号
H04Q3/58
主分类号
H04Q3/58
代理机构
代理人
主权项
地址
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