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掺气 : 90 phrases in 14 subjects |
Bridge construction | 2 |
Chemistry | 2 |
Construction | 1 |
Earth sciences | 1 |
Electronics | 12 |
Engineering geology | 1 |
General | 1 |
Hydroelectric power stations | 20 |
Hydrology | 1 |
Metallurgy | 1 |
Nautical | 2 |
Surgery | 1 |
Technology | 44 |
Water resources | 1 |