连 续波 : 255 phrases in 21 subjects |
Air defense | 54 |
Aviation | 16 |
Bridge construction | 1 |
Chemistry | 2 |
Computer networks | 1 |
Computers | 1 |
Construction | 1 |
Drilling | 1 |
Earth sciences | 4 |
Electronics | 45 |
General | 6 |
Geophysics | 12 |
Information technology | 5 |
Mathematics | 2 |
Nursing | 1 |
Oil / petroleum | 2 |
Plastics | 1 |
Shipbuilding | 5 |
Space | 57 |
Technology | 35 |
Telecommunications | 3 |