阴极射 线 : 256 phrases in 21 subjects |
Agriculture | 4 |
Air defense | 12 |
Automobiles | 1 |
Aviation | 10 |
Business | 1 |
Communications | 1 |
Earth sciences | 6 |
Electronics | 51 |
General | 27 |
Geophysics | 9 |
Information technology | 7 |
Mathematics | 1 |
Medical | 1 |
Metallurgy | 13 |
Oil / petroleum | 14 |
Radio | 2 |
Shipbuilding | 5 |
Space | 21 |
Technology | 67 |
Telecommunications | 2 |
Wind Energy | 1 |