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高度差 : 50 phrases in 14 subjects |
Aviation | 9 |
Construction | 1 |
Earth sciences | 1 |
Electric machinery | 1 |
Electronics | 1 |
Engineering geology | 1 |
General | 2 |
Metallurgy | 2 |
Rail transport | 1 |
Refrigeration | 2 |
Shipbuilding | 1 |
Skiing | 2 |
Space | 9 |
Technology | 17 |