发明名称 |
Mine stopping, permanent stopping form and method of installing same |
摘要 |
A portable wall section for incorporation in a mine stopping or for use as a mine permanent stopping or seal form, comprising vertically extensible panels secured in side-by-side relation, a stopping installed in a mine, a stopping system utilizing one or more of said sections, and methods of installing the stopping and form.
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申请公布号 |
US2003017005(A1) |
申请公布日期 |
2003.01.23 |
申请号 |
US20010903429 |
申请日期 |
2001.07.11 |
申请人 |
JACK KENNEDY METAL PRODUCTS & BUILDINGS, INC. |
发明人 |
KENNEDY WILLIAM R.;KENNEDY JOHN M. |
分类号 |
E21F17/103;(IPC1-7):E21D9/00;E21D11/00;E21D9/06 |
主分类号 |
E21F17/103 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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