 |
| |||
| symmetrical matrix | |||
| 对称阵: 44 phrases in 14 subjects |
| Air defense | 1 |
| Aviation | 1 |
| Bridge construction | 2 |
| Business | 3 |
| Corporate governance | 2 |
| Electronics | 2 |
| Engineering geology | 1 |
| General | 3 |
| Mathematics | 1 |
| Metallurgy | 2 |
| Oil / petroleum | 2 |
| Space | 3 |
| Technology | 20 |
| Wind Energy | 1 |