操作说 明 : 64 phrases in 20 subjects |
Automobiles | 1 |
Aviation | 23 |
Bridge construction | 3 |
Business | 3 |
Chemistry | 1 |
Compressors | 1 |
Earth sciences | 2 |
Economy | 3 |
Electronics | 2 |
Hydroelectric power stations | 1 |
Information technology | 1 |
Management | 1 |
Metallurgy | 4 |
Nautical | 1 |
Oil / petroleum | 1 |
Shipbuilding | 1 |
Space | 2 |
Technology | 9 |
Telecommunications | 3 |
Textile industry | 1 |