| |||
| 单位结构 | |||
|
unit structure : 27 phrases in 15 subjects |
| Agriculture | 1 |
| Aviation | 1 |
| Business | 2 |
| Chemistry | 4 |
| Commerce | 1 |
| Earth sciences | 1 |
| Genetics | 1 |
| Metallurgy | 2 |
| Metalworking | 2 |
| Nautical | 1 |
| Oil / petroleum | 1 |
| Plastics | 1 |
| Polymers | 4 |
| Steel production | 1 |
| Technology | 4 |