振 动 机 : 177 phrases in 21 subjects |
Armored vehicles | 1 |
Automated equipment | 2 |
Aviation | 5 |
Chemistry | 2 |
Construction | 6 |
Crystallography | 1 |
Drilling | 1 |
Electronics | 13 |
Environment | 1 |
Foundry | 1 |
General | 45 |
Geology | 1 |
Helicopters | 1 |
Mathematics | 2 |
Medical | 1 |
Metallurgy | 1 |
Mining | 2 |
Oil processing plants | 12 |
Rail transport | 1 |
Shipbuilding | 1 |
Technology | 77 |