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发明名称
Improvements connected with loudspeaking intercommunication systems
摘要
申请公布号
GB862262(A)
申请公布日期
1961.03.08
申请号
GB19590037671
申请日期
1959.11.06
申请人
HADLEY TELEPHONE & SOUND SYSTEMS LIMITED
发明人
KILMINSTER SHIRLEY ANTHONY
分类号
H04M9/00
主分类号
H04M9/00
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