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发明名称
A MINE SHAFT MICROWAVE COMMUNICATIONS SYSTEM
摘要
申请公布号
GB9109875(D0)
申请公布日期
1991.07.03
申请号
GB19910009875
申请日期
1991.05.08
申请人
QUALTER, HALL & CO LTD
发明人
分类号
主分类号
代理机构
代理人
主权项
地址
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