 |
| 乱石: 198 phrases in 14 subjects |
| Architecture | 10 |
| Bridge construction | 11 |
| Construction | 3 |
| Desert science | 3 |
| Drilling | 1 |
| Electronics | 5 |
| Engineering geology | 5 |
| Explosives and Explosive Ordnance Disposal | 1 |
| General | 6 |
| Geology | 1 |
| Hydroelectric power stations | 8 |
| Mountaineering | 1 |
| Technology | 142 |
| Water resources | 1 |