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| 冲击钻进; 锤击钻进 | |||
| 冲击式钻进; 冲击式凿岩 | |||
| hammer drilling: 14 phrases in 6 subjects |
| Architecture | 1 |
| Drilling | 1 |
| Electronics | 1 |
| Engineering geology | 2 |
| Oil / petroleum | 2 |
| Technology | 7 |
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