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发明名称
TELEPHONE SYSTEMS
摘要
申请公布号
GB1483806(A)
申请公布日期
1977.08.24
申请号
GB19740052767
申请日期
1974.12.06
申请人
SIEMENS AG
发明人
分类号
H04M3/46;(IPC1-7):H04M3/46;H04M3/02
主分类号
H04M3/46
代理机构
代理人
主权项
地址
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