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发明名称
TELEPHONE SYSTEMS
摘要
申请公布号
GB1495994(A)
申请公布日期
1977.12.21
申请号
GB19750010420
申请日期
1975.03.13
申请人
SIEMENS AG
发明人
分类号
H04Q1/448;H04Q3/62;(IPC1-7):H04Q3/62;H04M3/02
主分类号
H04Q1/448
代理机构
代理人
主权项
地址
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