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设计阶段 | |||
设计水位 |
design stage: 42 phrases in 11 subjects |
Aviation | 1 |
Bridge construction | 11 |
Business | 2 |
Engineering geology | 2 |
Explosives and Explosive Ordnance Disposal | 1 |
Hydroelectric power stations | 5 |
Metallurgy | 1 |
Rail transport | 1 |
Refrigeration | 1 |
Space | 1 |
Technology | 16 |