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speed switch : 56 phrases in 13 subjects |
Automobiles | 7 |
Aviation | 2 |
Communications | 1 |
Electric machinery | 3 |
Electronics | 16 |
Geophysics | 1 |
Hydroelectric power stations | 1 |
Metallurgy | 2 |
Rail transport | 3 |
Shipbuilding | 2 |
Space | 2 |
Technology | 15 |
Wind Energy | 1 |