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发明名称
SPRECHWEG-VORRICHTUNG
摘要
申请公布号
DE2710281(A1)
申请公布日期
1977.09.15
申请号
DE19772710281
申请日期
1977.03.09
申请人
HITACHI,LTD.
发明人
MUKAEMACHI,TAKUJI;TAKESHITA,TETSUO;ENAMI,SHIRO
分类号
H04Q3/545;H04Q3/52;(IPC1-7):H04Q3/48
主分类号
H04Q3/545
代理机构
代理人
主权项
地址
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