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发明名称
COMMUNICATION INSTALLATION
摘要
申请公布号
GB1324128(A)
申请公布日期
1973.07.18
申请号
GB19710047498
申请日期
1971.10.12
申请人
CHARBONNAGES DE FRANCE
发明人
分类号
G08B3/10;(IPC1-7):H04Q7/02
主分类号
G08B3/10
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