有效 功 率 : 98 phrases in 18 subjects |
Air defense | 7 |
Automobiles | 9 |
Aviation | 6 |
Business | 2 |
Drilling | 2 |
Earth sciences | 1 |
Electric machinery | 9 |
Electronics | 16 |
General | 3 |
Geophysics | 2 |
Information technology | 3 |
Mechanics | 6 |
Metallurgy | 3 |
Refrigeration | 1 |
Space | 1 |
Technology | 18 |
Telecommunications | 1 |
Wind Energy | 8 |