双刀双 掷 : 32 phrases in 14 subjects |
Automobiles | 1 |
Aviation | 2 |
Earth sciences | 2 |
Electronics | 5 |
General | 2 |
Geophysics | 3 |
Hydroelectric power stations | 1 |
Information technology | 4 |
Navigation | 1 |
Oil / petroleum | 1 |
Rail transport | 1 |
Space | 4 |
Technology | 4 |
Telecommunications | 1 |