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| prestressed structure | |||
| 预 应 力结构: 24 phrases in 6 subjects |
| Explosives and Explosive Ordnance Disposal | 1 |
| Hydroelectric power stations | 6 |
| Metallurgy | 2 |
| Oil / petroleum | 1 |
| Rail transport | 1 |
| Technology | 13 |
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