| 发明名称 |
DEVICE FOR STABILIZING THE COURSE OF THE TUNNELLING ELEMENT |
| 摘要 |
A device for stabilizing the course of the tunnelling element, provided with a follow-up unit interacting with the walls of the hole and operating the power units which introduce corrections into the course of the tunnelling element.
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| 申请公布号 |
US3677354(A) |
申请公布日期 |
1972.07.18 |
| 申请号 |
USD3677354 |
申请日期 |
1970.12.15 |
| 申请人 |
ALEXANDR DMITRIEVICH KOSTYLEV;KONSTANTIN STEPANOVICH GURKOV;KHAI BERKOVICH IKACH;NIKOLAI PROKHOROVICH CHEPURNOI |
发明人 |
ALEXANDR DMITRIEVICH KOSTYLEV;KONSTANTIN STEPANOVICH GURKOV;KHAI BERKOVICH IKACH;NIKOLAI PROKHOROVICH CHEPURNOI |
| 分类号 |
E21B7/06;E21B7/26;E21B7/30;E21D9/00;(IPC1-7):E21B7/10 |
主分类号 |
E21B7/06 |
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