 |
| |||
| percussion drilling; percussion drill | |||
| cable-tool well | |||
| boring by percussion; percussive drilling | |||
| jump drilling; punching drilling | |||
|
冲 击钻井 : 18 phrases in 5 subjects |
| Drilling | 5 |
| Ecology | 1 |
| Engineering geology | 2 |
| Oil / petroleum | 7 |
| Technology | 3 |
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