| 发明名称 |
Automatic recovery system for plugs and excavation materials |
| 摘要 |
The present invention relates to a system for automatically recovering the entirety of the excavated materials in the order in which they are raised to the surface.
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| 申请公布号 |
US4098698(A) |
申请公布日期 |
1978.07.04 |
| 申请号 |
US19760724840 |
申请日期 |
1976.09.20 |
| 申请人 |
FORACO FORAGE RATIONNEL CONSTRUCTION |
发明人 |
LAMOTHE, ANDRE |
| 分类号 |
E21B25/00;E21B21/12;E21B21/16;E21B27/00;E21B49/02;G01N1/08;(IPC1-7):B01D23/06 |
主分类号 |
E21B25/00 |
| 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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