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经营范围
发明名称
AUXILIARY VENTILATION SYSTEM FOR UNDERGROUND SITES
摘要
申请公布号
GB2085151(B)
申请公布日期
1984.07.25
申请号
GB19810028613
申请日期
1981.09.22
申请人
ELLIOTT GORDON;ELLIOTT STEPHEN;ELLIOTT FRANK
发明人
分类号
E21F1/00;(IPC1-7):E21F1/00
主分类号
E21F1/00
代理机构
代理人
主权项
地址
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