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发明名称
RAILWAY CONTROL TELEPHONE SYSTEM
摘要
申请公布号
JPH0220162(A)
申请公布日期
1990.01.23
申请号
JP19880168806
申请日期
1988.07.08
申请人
NEC ENG LTD
发明人
MORI MICHIO
分类号
H04M9/00
主分类号
H04M9/00
代理机构
代理人
主权项
地址
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