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发明名称
TELEPHONE EXCHANGE SYSTEM
摘要
申请公布号
JPH0289454(A)
申请公布日期
1990.03.29
申请号
JP19880239726
申请日期
1988.09.27
申请人
CANON INC
发明人
OTSUKA KUNIAKI
分类号
H04Q3/58;H04M11/00
主分类号
H04Q3/58
代理机构
代理人
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