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发明名称
MAINTENANCE-FREE SYSTEM FOR EXCHANGE
摘要
申请公布号
JPH07240793(A)
申请公布日期
1995.09.12
申请号
JP19940216719
申请日期
1994.08.19
申请人
TOSHIBA CORP
发明人
URUI KIYOSHI;HASEGAWA ATSUSHI
分类号
H04M3/42;H04M3/00;H04Q3/545;(IPC1-7):H04M3/42
主分类号
H04M3/42
代理机构
代理人
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