断路 开 关 : 39 phrases in 14 subjects |
Automobiles | 2 |
Aviation | 1 |
Electric machinery | 2 |
Electronics | 5 |
Geophysics | 2 |
Information technology | 1 |
Lighting other than cinema | 1 |
Mechanics | 1 |
Metallurgy | 3 |
Oil / petroleum | 1 |
Shipbuilding | 4 |
Space | 2 |
Technology | 13 |
Telecommunications | 1 |