| 发明名称 |
Steering of mining machines |
| 摘要 |
A mineral mining machine which wins a strip of mineral by separate roof and floor cutting stages comprises steering apparatus which senses the cutting horizon associated with one cutting stage to control the cutting horizon associated with the other cutting stage.
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| 申请公布号 |
US4072349(A) |
申请公布日期 |
1978.02.07 |
| 申请号 |
US19760687761 |
申请日期 |
1976.05.19 |
| 申请人 |
COAL INDUSTRY (PATENTS) LIMITED |
发明人 |
HARTLEY, DENNIS |
| 分类号 |
E21C35/10;E21C35/24;G01N23/203;(IPC1-7):E21C35/08 |
主分类号 |
E21C35/10 |
| 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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