| 发明名称 |
DRILLING DURING SHAFT-SINKING |
| 摘要 |
A shaft sinking platform 11 has three potholes surmounted by tubes 20. A drilling boom in each of the tubes 20 is moved up and down by means of a winch 23. In the drilling position the boom is held by special clamps. <IMAGE> |
| 申请公布号 |
GB2178777(B) |
申请公布日期 |
1988.04.27 |
| 申请号 |
GB19850019151 |
申请日期 |
1985.07.30 |
| 申请人 |
* BOART |
发明人 |
BRUCE ALLEN GEORGE EDWARD * FOSTER;ALAN * HUNT |
| 分类号 |
E21D;E21D1/06;(IPC1-7):E21D1/06 |
主分类号 |
E21D |
| 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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