| 发明名称 |
ELONGATE MINE PROP |
| 摘要 |
<p>A mine support comprises a timber pole having longitudinal grooves spaced apart around it, with the groove depth being deepest at one pole end and extending linearly shallower to meet the pole surface short of the other pole end. A relatively thin walled mild steel sleeve is fitted around the pole to cover the grooves.</p> |
| 申请公布号 |
CA1216434(A) |
申请公布日期 |
1987.01.13 |
| 申请号 |
CA19840452624 |
申请日期 |
1984.04.24 |
| 申请人 |
BESTOBELL SOUTH AFRICA LIMITED |
发明人 |
VENTER, DIRK C.S.;VENTER, MARCUS M. |
| 分类号 |
E21D15/02;(IPC1-7):E21D15/02 |
主分类号 |
E21D15/02 |
| 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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