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发明名称
DIRECT ROUTE CHANGEOVER CIRCUIT WHEN FAULT OF TELEPHONE EXCHANGE OCCURS
摘要
申请公布号
JPH0271651(A)
申请公布日期
1990.03.12
申请号
JP19880222408
申请日期
1988.09.07
申请人
TOSHIBA CORP
发明人
MATSUZAKI NOBUO
分类号
H04M3/22;H04Q3/58
主分类号
H04M3/22
代理机构
代理人
主权项
地址
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