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发明名称
FERNSPRECH-TEILNEHMERSCHALTUNG
摘要
申请公布号
PT84929(A)
申请公布日期
1987.06.01
申请号
PT19870084929
申请日期
1987.05.21
申请人
SIEMENS AKTIENGESELLSCHAFT
发明人
HELMUT BECK;ERIK MALLY
分类号
H04B1/58;H04M19/00;(IPC1-7):H04M1/00
主分类号
H04B1/58
代理机构
代理人
主权项
地址
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