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发明名称
摘要
申请公布号	DE2057178(A1)	申请公布日期	1971.12.09
申请号	DE19702057178	申请日期	1970.11.20
申请人		发明人
分类号	H04Q3/54;(IPC1-7):H04M3/54	主分类号	H04Q3/54
代理机构		代理人
主权项
地址

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