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| 冲击钻 | |||
| 钢丝绳旋冲钻进; 冲击钻进 | |||
| 无游梁绳式顿钻 | |||
| 钢丝绳冲击钻进; 顿钻钻井; 舂钻; 冲击钻 (探) | |||
| churn drilling: 2 phrases in 2 subjects |
| Hydroelectric power stations | 1 |
| Technology | 1 |
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