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发明名称
DIRECT SWITCHING DEVICE
摘要
申请公布号
JPH01235452(A)
申请公布日期
1989.09.20
申请号
JP19880060304
申请日期
1988.03.16
申请人
TOSHIBA CORP
发明人
OKA TSUNEAKI
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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