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发明名称
TELEPHONE SET LOUDSPEAKING CIRCUIT
摘要
申请公布号
JPH04127646(A)
申请公布日期
1992.04.28
申请号
JP19900248237
申请日期
1990.09.18
申请人
NEC CORP
发明人
KODERA KENJI
分类号
H03F1/00;H04M1/60
主分类号
H03F1/00
代理机构
代理人
主权项
地址
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