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| 混凝土喷射 | |||
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| 混凝土喷射 | |||
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concrete- spraying : 110 phrases in 5 subjects |
| Electronics | 1 |
| Engineering geology | 2 |
| Explosives and Explosive Ordnance Disposal | 1 |
| Hydroelectric power stations | 1 |
| Technology | 105 |
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