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发明名称
METHOD OF AND APPARATUS FOR FILLING UNDERGROUND MINE WORKINGS
摘要
申请公布号
PL138068(B2)
申请公布日期
1986.08.30
申请号
PL19840249715
申请日期
1984.09.21
申请人
发明人
分类号
E21F;E21F15/00;(IPC1-7):E21F15/00
主分类号
E21F
代理机构
代理人
主权项
地址
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