断 续器 : 98 phrases in 18 subjects |
Agriculture | 1 |
Air defense | 2 |
Automobiles | 2 |
Aviation | 3 |
Chemistry | 2 |
Construction | 1 |
Earth sciences | 1 |
Electronics | 11 |
General | 8 |
Information technology | 1 |
Mechanics | 1 |
Metallurgy | 3 |
Oil / petroleum | 2 |
Physics | 2 |
Shipbuilding | 2 |
Space | 3 |
Technology | 52 |
Telecommunications | 1 |