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| 墙的坡度 | |||
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wall slope : 17 phrases in 7 subjects |
| Architecture | 2 |
| Bridge construction | 1 |
| Explosives and Explosive Ordnance Disposal | 2 |
| Hydroelectric power stations | 1 |
| Management | 2 |
| Oil / petroleum | 1 |
| Technology | 8 |
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