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| 安全施工 | |||
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safety construction : 21 phrases in 8 subjects |
| China | 5 |
| Earth sciences | 1 |
| Explosives and Explosive Ordnance Disposal | 1 |
| Hydroelectric power stations | 1 |
| Labor law | 1 |
| Nautical | 1 |
| Shipbuilding | 1 |
| Technology | 10 |
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