 |
| |||
| 凿岩钻〔钎〕头 | |||
| 牙轮钻头 | |||
| 凿岩钻头; 岩芯钻头 | |||
| 牙轮【岩石】钻头 | |||
| 钻岩钻头 | |||
| 凿岩钎头 | |||
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rock bit : 59 phrases in 8 subjects |
| Bridge construction | 1 |
| Company name | 2 |
| Drilling | 11 |
| Engineering geology | 4 |
| Explosives and Explosive Ordnance Disposal | 1 |
| Metallurgy | 1 |
| Oil / petroleum | 9 |
| Technology | 30 |
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