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| boring by percussion (机); hammer drilling; percussion drilling; percussive drilling | |||
| 冲击式凿岩: 19 phrases in 5 subjects |
| Bridge construction | 1 |
| Earth sciences | 1 |
| Engineering geology | 4 |
| Explosives and Explosive Ordnance Disposal | 3 |
| Technology | 10 |
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