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.
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
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