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发明名称
DEVICE FOR SEALING AN OPENING
摘要
<p>A device (11) for sealing an opening in a mine, the device including at least two vertically aligned subchambers (17) having a substantially circular cross section, each subchamber being at least partially able to be filled with a filler.</p>
申请公布号
WO1998046859(A1)
申请公布日期
1998.10.22
申请号
AU1998000262
申请日期
1998.04.14
申请人
发明人
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主分类号
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