 |
| |||
| 平均密度 | |||
| 平均容重 | |||
| average density: 22 phrases in 11 subjects |
| Electric machinery | 4 |
| Electronics | 3 |
| Engineering geology | 1 |
| Explosives and Explosive Ordnance Disposal | 1 |
| Forestry | 1 |
| Metallurgy | 2 |
| Oil / petroleum | 3 |
| Space | 1 |
| Technology | 3 |
| Telecommunications | 1 |
| Wind Energy | 2 |