| 发明名称 |
Earth working machine having independent tools and roof engaging bridge |
| 摘要 |
A mobile earth working machine has a tracked base on which various tools such as an impactor hammer and a side delivery bucket are mounted on separate booms.
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| 申请公布号 |
US4098538(A) |
申请公布日期 |
1978.07.04 |
| 申请号 |
US19770787179 |
申请日期 |
1977.04.13 |
| 申请人 |
MINING DEVELOPMENTS LIMITED |
发明人 |
HILTON, ALLAN RICHARD |
| 分类号 |
E21C35/00;E21D9/10;(IPC1-7):E21C33/00 |
主分类号 |
E21C35/00 |
| 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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