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发明名称
PRIVATE BRANCH OF EXCHANGE
摘要
申请公布号
JPS6427355(A)
申请公布日期
1989.01.30
申请号
JP19880002220
申请日期
1988.01.08
申请人
RICOH CO LTD
发明人
MORITA TETSUYA
分类号
H04M3/42
主分类号
H04M3/42
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代理人
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