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发明名称
Loud-speaking telephone systems, particularly for use in mines
摘要
申请公布号
GB928091(A)
申请公布日期
1963.06.06
申请号
GB19590034709
申请日期
1959.10.13
申请人
ASSOCIATED ELECTRICAL INDUSTRIES LIMITED
发明人
LESLIE JOHN ANGUS
分类号
H04M9/00
主分类号
H04M9/00
代理机构
代理人
主权项
地址
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