 |
| 回火: 541 phrases in 31 subjects |
| Agriculture | 3 |
| Architecture | 5 |
| Astronautics | 1 |
| Automobiles | 42 |
| Aviation | 6 |
| Business | 3 |
| Chemistry | 1 |
| Compressors | 6 |
| Construction | 2 |
| Cultural studies | 1 |
| Earth sciences | 2 |
| Electric machinery | 1 |
| Electronics | 6 |
| Engineering geology | 1 |
| Exhibitions | 1 |
| General | 37 |
| International trade | 1 |
| Latin | 1 |
| Mechanics | 5 |
| Metallurgy | 208 |
| Metalworking | 2 |
| Nautical | 3 |
| Oil / petroleum | 10 |
| Rail transport | 1 |
| Refrigeration | 1 |
| Shipbuilding | 18 |
| Space | 29 |
| Steel production | 3 |
| Technology | 137 |
| Thermal Energy | 1 |
| Wind Energy | 3 |