指示盘: 89 phrases in 18 subjects |
Air defense | 1 |
Automobiles | 7 |
Aviation | 6 |
Business | 1 |
Compressors | 1 |
Computer numerical control | 2 |
Drilling | 1 |
Earth sciences | 2 |
Electric machinery | 1 |
Electronics | 4 |
General | 4 |
Metallurgy | 10 |
Oil / petroleum | 5 |
Plastics | 2 |
Shipbuilding | 2 |
Space | 2 |
Technology | 36 |
Textile industry | 2 |