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发明名称
TELEPHONE SYSTEMS
摘要
申请公布号
GB1370163(A)
申请公布日期
1974.10.16
申请号
GB19720010695
申请日期
1972.03.08
申请人
SIEMENS AG
发明人
分类号
H04M19/02;H04Q3/00;(IPC1-7):H04M19/02
主分类号
H04M19/02
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代理人
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