 |
| 废气: 793 phrases in 45 subjects |
| Agriculture | 5 |
| Animal husbandry | 3 |
| Architecture | 1 |
| Armored vehicles | 1 |
| Automobiles | 105 |
| Aviation | 8 |
| Bioenergy | 1 |
| Business | 3 |
| Chemistry | 7 |
| China | 1 |
| Commerce | 1 |
| Consulting | 1 |
| Corporate governance | 1 |
| Drilling | 6 |
| Earth sciences | 1 |
| Ecology | 56 |
| Electric machinery | 1 |
| Electronics | 34 |
| Energy industry | 1 |
| Environment | 17 |
| Exhibitions | 1 |
| Fishery fishing industry | 2 |
| General | 16 |
| Hydrology | 1 |
| Laboratory equipment | 1 |
| Management | 3 |
| Mechanics | 1 |
| Metallurgy | 126 |
| Nautical | 34 |
| Nuclear and fusion power | 6 |
| Oil / petroleum | 17 |
| Oil processing plants | 8 |
| Plastics | 3 |
| Racing and motorsport | 2 |
| Rail transport | 6 |
| Refrigeration | 7 |
| Shipbuilding | 16 |
| Space | 11 |
| Steel production | 2 |
| Technology | 257 |
| Textile industry | 4 |
| Transport | 1 |
| United Nations | 2 |
| Water resources | 3 |
| Wind Energy | 9 |