 |
| 下 水管: 263 phrases in 23 subjects |
| 1 | |
| Agriculture | 6 |
| Animal husbandry | 1 |
| Architecture | 3 |
| Bridge construction | 1 |
| Chemistry | 1 |
| China | 1 |
| Construction | 1 |
| Consulting | 1 |
| Drilling | 1 |
| Earth sciences | 3 |
| Ecology | 9 |
| Electronics | 4 |
| Engineering geology | 9 |
| General | 6 |
| Hydroelectric power stations | 7 |
| Metallurgy | 2 |
| Navigation | 8 |
| Oil / petroleum | 22 |
| Plastics | 4 |
| Refrigeration | 1 |
| Technology | 170 |
| Water resources | 1 |