 |
| 煤气炉: 300 phrase in 15 subjects |
| Agriculture | 1 |
| Animal husbandry | 1 |
| Architecture | 1 |
| Automobiles | 5 |
| Aviation | 1 |
| Chemistry | 18 |
| Compressors | 2 |
| Environment | 1 |
| General | 5 |
| Metallurgy | 153 |
| Oil / petroleum | 2 |
| Oil and gas technology | 1 |
| Refrigeration | 1 |
| Steel production | 2 |
| Technology | 106 |