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经营范围
发明名称
Surveillance system
摘要
申请公布号
GB2095445(A)
申请公布日期
1982.09.29
申请号
GB19810009141
申请日期
1981.03.24
申请人
COAL INDUSTRY (PATENTS) LTD
发明人
分类号
E21F1/00;E21F17/18;H04Q9/12;(IPC1-7):H04Q9/12
主分类号
E21F1/00
代理机构
代理人
主权项
地址
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