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钻 用金 刚石 : 16 phrases in 7 subjects |
| Architecture | 1 |
| Explosives and Explosive Ordnance Disposal | 2 |
| General | 1 |
| Metallurgy | 2 |
| Oil / petroleum | 1 |
| Shipbuilding | 1 |
| Technology | 8 |
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