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发明名称
RINGING COMPENSATION CIRCUIT
摘要
申请公布号
JPH02205176(A)
申请公布日期
1990.08.15
申请号
JP19890023847
申请日期
1989.02.03
申请人
HITACHI LTD
发明人
ONISHI MAKOTO
分类号
H04N5/208
主分类号
H04N5/208
代理机构
代理人
主权项
地址
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