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发明名称
TELEPHONE SYSTEM AND SPEECH LEVEL ADJUSTING METHOD THEREFOR
摘要
申请公布号
GB9105303(D0)
申请公布日期
1991.04.24
申请号
GB19910005303
申请日期
1991.03.13
申请人
KABUSHIKI KAISHA TOSHIBA
发明人
分类号
H04Q3/58;H04M3/00;H04M3/22;H04Q1/54;H04Q11/04
主分类号
H04Q3/58
代理机构
代理人
主权项
地址
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