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发明名称
EXCHANGE SYSTEM
摘要
申请公布号
JPH03242073(A)
申请公布日期
1991.10.29
申请号
JP19900040173
申请日期
1990.02.20
申请人
TOSHIBA CORP
发明人
SUZUKI KOICHI
分类号
H04M3/44
主分类号
H04M3/44
代理机构
代理人
主权项
地址
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