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| 安全给水; 安全水域 | |||
| 安全饮水 | |||
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safe water : 24 phrases in 6 subjects |
| Environment | 1 |
| Explosives and Explosive Ordnance Disposal | 1 |
| Food industry | 1 |
| Hydroelectric power stations | 1 |
| Technology | 9 |
| Water resources | 11 |
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