操作手册 : 85 phrases in 21 subjects |
Air defense | 1 |
Automobiles | 3 |
Aviation | 29 |
Business | 1 |
Economy | 10 |
Electronics | 4 |
Exhibitions | 1 |
General | 2 |
Geology | 1 |
Hydroelectric power stations | 2 |
International trade | 1 |
Name of organization | 1 |
Nautical | 11 |
Oil / petroleum | 1 |
Oil processing plants | 2 |
Project management | 1 |
Shipbuilding | 2 |
Space | 5 |
Technology | 5 |
Textile industry | 1 |
United States | 1 |