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轴向压力 : 30 phrases in 9 subjects |
| Bridge construction | 9 |
| Drilling | 1 |
| Explosives and Explosive Ordnance Disposal | 2 |
| Hydroelectric power stations | 2 |
| Mechanics | 1 |
| Nautical | 1 |
| Oil / petroleum | 3 |
| Technology | 10 |
| Wind Energy | 1 |
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